Then BANG… Another Universe!


It’s not uncommon for people to wonder if humanity is alone in the vast Universe. But too often we are thinking of the here and now, wondering if an advanced space alien civilization is making contact with us. Or we are looking forward to a future where we might be able to discover another advanced civilization in the farthest reaches of outer space. But what about eons in the past? Isn’t it a bit egotistical to think that our Universe is the only one that ever existed?

For Americans, this assumption is probably rooted in Judeo-Christian teachings that have long held that mankind is the only creation of their god. But if you take the limitations of religion out of the picture and only consider the Universe from a scientific perspective, the first thing the gringa realizes is that not only could mankind be one of any number of species right now, but there may have been any number of other species’ that have lived before us. New models of the cosmos support that even other universes could have existed before ours.

Scientists estimate our own universe is more than 13 billion years old. They suspect that some amazing energy event created our Universe. It is often referred to as the Big Bang. But it may not have been the first Bang. Modeling a theory of multiple Big Bangs that have produced multiple universes is all based on Einstein’s theory of relativity.

As it goes, in a nutshell, a Big Bang cannot be a singular event. Instead, it is a perpetual cycle of cosmic expansion, collapse into itself, then BANG, a new universe.  Look at it like a Universe growing much the way a pregnant woman’s womb grows. When a universe reaches full growth maturity, it collapses. The energy produced by the collapse then explodes with new life, another Universe. Each Universe is created by the death of the Universe that gave birth to it. The Big Bang is really just cosmic labor that leaves a new Universe an orphan.

What that means for humanity is that our own Universe will give birth one day. Whatever generation is alive when that happens will be the last of mankind before an explosive extinction. That is, unless we can successfully colonize another planet in another Universe. But that would then have to mean that we don’t really live in a Universe, but, rather, a Multiverse.

It would seem that even if we manage to survive the effects of climate change, mankind is still doomed. So, the gringa suggests that we all get this climate change issue resolved so we can focus on an even greater challenge if we want to avoid extinction. We need to find another darn Universe, develop the technology to get there FAST, and start over. And do it right the next time!

 

Sources:

www.ibtimes.come

www.space.com

Image Credit: imgarcade.com

 

 

 

And The Winning Asteroid Is…


NASA’s Asteroid Redirect Mission (ARM) scheduled in the mid -2020s has yet to determine which asteroid they plan to go out and corral into the orbit of our moon. The work is still ongoing to determine the winning asteroid candidate. So far, NASA has narrowed the selection down to the following three candidates: Itokawa, Bennu and 2008 EV5. It is possible, however, other asteroids could be added to this short list and these current favorites could be eliminated. The gringa feels like it’s a bad scene from a science fiction Bachelor episode.

Since NASA announced its asteroid initiative to the public three years ago, science experts as well as science enthusiasts from all over the world have collaborated in identifying these Big Bang rock leftovers throughout the cosmos.  These efforts have been so successful, detection of near-Earth asteroids (NEOs) has increased by sixty-five percent.

On December 29, 2010,  the Japanese Aerospace Exploration Agency’s (JAEA) spacecraft “Hayabusa” returned to Earth with samples from an asteroid they named “Itokawa”. The Japanese led international crew of scientists brought back a chunk of an alien world.  Hayabusa traveled one billion kilometers  for over two years to execute what must be the world’s longest pick-up and delivery service ever. The gringa would not want to pick up the tab for that tip! Five bucks for the pizza guy is my absolute limit! This successful joint mission of multiple nations led by the Japanese was successful in bringing scientists dust particles from another world, the third such achievement the world has ever seen.

Images of Itokawa were taken when the asteroid crossed near Earth in 2005. It’s surface is unique to any others that have been observed because it seems to have no craters. The scientists are really scratching their heads over this little mystery. One hypothesis thinks it’s possible that craters simply cannot form on Itokawa because rather than being a solid rock asteroid, it actually is a junk pile of multiple space rocks and ice chunks held together by gravity. If it gets struck by a meteor, it would just jiggle around. The gringa’s not so sure she holds with this theory, but, hey, I’m not scientist. Who am I to criticize. The asteroid holds other novelties as well. One part of its interior is denser than the other. For the gringa, that sounds like people. The experts will continue their studies and, maybe one day, the world will know the answer to why Itokawa has a hard spot and no pock marks. It almost sounds like a disease.

Another asteroid favorite is Bennu. This little fella seems to have led a hard life. Researchers believe old Bennu (billions of years old) was dismembered by the gravity of multiple planets. Now THAT’S what the gringa calls living in a rough neighborhood. NASA’s Goddard Space Flight Center in Greenbelt, Maryland has produced an animated video to introduce Bennu. It can be viewed here, on NASA’s website, or on YouTube.

In late 2016 a mission to Bennu is planned to launch. It should take about seven years for samples to be retrieved and then returned to Earth. Scientists suspect that Bennu is made up of chondrules. These are grains of mineral (in other words, space sand) that are held together by gravity and stationary electrical charges to form a solid rock. Scientist want to test their theory by getting their hands on some samples.

Bennu is important because it is like a time capsule which has preserved itself since the Big Bang that gave birth to it. It has not experienced geologic and chemical changes like our Earth. Bennu could possibly be a pristine example of the most primitive material in the entire solar system. This could help the scientific community understand how life began if organic material is present on Bennu that could have the building blocks of terrestrial life, such as carbon and hydrogen.

Bennu is not as dense as a regular Earth rock so it could possibly be hollow. It could be just another pile of rubble like Itokawa. It is also very dark, like asphalt. Because of this, it absorbs lots of sunlight which then creates a radiating effect which causes a reaction a bit like propulsion which affects its orbit. This is known as the Yarkovsky effect. So, basically, Bennu just kind of wanders the galaxy willy-nilly and why it has sometimes had close encounters with Saturn, Venus and Earth. The theory of being a rubble pile then explains why it seems to change shape because, when having a close call with a large planet, the gravitational effect would pull it apart and reshape it.

Now, NASA may call a Bennu encounter a “close call”, but the gringa’s not too worried. There is only a 1 in 2,500 chance that it could impact the Earth in our lifetime. We’ve got plenty of time to develop a planetary defense system that can give Bennu a little poke in the eye if he gets too close and send him on his way again.

The third contender for the asteroid lasso rodeo is asteroid 2008 EV5. Not a very romantic name. The gringa thinks the experts could have come up with something a bit more catchy. March 4, 2008 (big surprise there), the Mount Lemmon Survey in Tucson, Arizona discovered 2008 EV5. This asteroid has an interesting prominent ridge that parallels the rock’s equator, broken only be a depression 150 meters in diameter which is probably an impact crater. The surface seems to be very rocky so, once again, probably a junk heap asteroid made up of carbonaceous chondrite. It could be Bennu’s evil twin.

The gringa has discovered that at this time, 2008 EV5 is the favorite because it seems to be filled with “cobbles” or stones that meet the dimensions best suited for the ARM robotic retrieval system. I am so disappointed that what may be the most important asteroid of my lifetime will not have a clever or catchy name like Itokawa or Bennu. The world will know the final decision sometime in 2019. The gringa is crossing her fingers for an asteroid with a really cool name, like Gringa2015.  A girl can dream, right?!

Sources and Photo Credit: www.nasa.gov

Asteroid Ahead! Redirect! Redirect!


I am a sci-fi fan. I love to read science fiction books, watch science fiction movies and even indulge in trolling some of the latest conspiracy theory sites on the future Armageddon triggered by an apocalyptical asteroid-Earth collision event. One thing I have learned throughout my many years of science fiction madness is that there is usually an itsy-bitsy kernel of truth within the fantastical story. The gringa has found such a tidbit of truth within the asteroid-Earth collision story and it comes straight from NASA.

A one of a kind robot mission is being planned at NASA regarding an asteroid near Earth. The robot’s job within the next decade is to gather a mega-ton boulder from an asteroid and redirect it into an orbit around the Moon. This asteroid sample would be explored about five years later and samples returned to Earth from its surface.  This mission, begun in 2013, is called “Asteroid Redirect Mission” (ARM) and is all part of the plan for getting humans to Mars in the 2030’s. This little information nugget is what is fueling the preppers and conspiracists who think all of mankind is doomed sometime this September by an asteroid-Earth catastrophe. As these folks hunker down in their bunkers, the gringa asks the dear reader to simply read on and amuse yourself.

Out of the thousand-plus asteroids astronauts have to select from, they have four that are favorites. A bit more research on their orbit, velocity, spin and size will be conducted for a few more years before a final decision is made. To speed things along, NASA also has created an initiative called the “Asteroid Grand Challenge”. Its purpose is to identify asteroids that pose a potential hazard not just through NASA’s efforts but through collaboration with other cosmic partners. For the astronaut hopeful, physicist, hobbyist astronomer and such in my reading audience, who knows, perhaps you could lend a hand and be a part of something fantastic. Since the plan to launch ARM is scheduled for some time in the 2020 decade, you’ve got plenty of time to get to work.

Now, considering my insatiable curiosity, the gringa has to ask, “Why should we spend so much taxpayer money and risk the lives of astronauts to collect some kazillion years old space rocks?” The answer? Asteroids are considered to be the remnants of the Big Bang. They are the left overs. By having access to an asteroid as near as our Moon, scientists can study more samples than ever before. This helps to satisfy their insatiable curiosity as to how our solar system was formed and life on Earth began. In other words, the discoveries could lead to mankind saving the planet and figuring out how to colonize another planet. There are also possibilities of finding frozen water sources which could hold all sorts of interesting things within to study under a microscope, maybe even a frozen bubble of breathable air. That would indicate the possibility of a sister planet that a human could survive on without a protective suit or artificial environment. And, of course, there are always “those” people who hope to find another energy and fuel source. You know, the ones who don’t look at outer space with curiosity and wonder but with dollar signs in their eyes.

The mission will develop a planetary defense technique that could be used to deflect an asteroid that posed a dangerous threat to Earth. Now, if you’re already questioning whether it’s even a good idea to nudge an asteroid over to the Moon and ask the sort of questions the gringa asks, like, “Um, guys, could it just be THAT could become the asteroid that ends up threatening all civilization?” Rest assured, NASA has thought of that as well. That is the reason for the studies on size, mass, velocity and speed. They want to capture an asteroid large enough to provide great research opportunity but small enough to burn up in the atmosphere if it did go rogue and plummet towards Earth.

The gringa also considers, “This all sounds fascinating but, exactly how does this get us closer to Mars?” Well, ever since mankind has begun to climb into rockets and physically explore the cosmos, astronauts have been dependent upon supplies and support from Earth. This has limited the amount of time astronauts can remain in space and how far they can travel. Such missions are labeled “Earth Reliant”. The “Proving Ground” of the deep space environment surrounding the moon is closer to what space travelers will experience on a trip to Mars. For example, solar and cosmic radiation is stronger outside low-Earth orbit and closer to the Moon.

Presently, a typical astronaut mission on the International Space Station (ISS) can last up to six months (about 180 days).  A manned mission to Mars could take 500 days or more. Most of that time is simply in transit back and forth (about six months each way). To become completely Earth independent journeys,  new technologies and methods will be tested on the asteroid.

One such technology to test is Solar Electric Propulsion (SEP). This would do away with chemical dependent propulsion allowing larger on-board payloads in place of the weight that would have otherwise been dedicated to fuel. A larger payload means more on board supplies. More on board supplies means a longer mission capability. Solar propulsion also means energy independence. Energy independence means limitless distance capability of travel within our solar system. By having the asteroid, NASA can test the SEP system as a robotic system that can simulate sending cargo to Mars well before habitants arrive.

Once a robotic spacecraft has successfully landed on Mars, the next phase would then be to launch a crew to Mars. This crew will need to have the skills and technology to maneuver and dock with the Martian robotic spacecraft. This can be practiced on the asteroid delivered to Moon orbit.

Now, a trip to Mars is not a hot-shot, non-stop flight. The plan is actually to have a staged journey. Between Earth and Mars would be multiple ports of call similar in nature to the current ISS. The Orion is NASA’s current exploration craft that will be used in future solar system exploration.  All astronauts slated for Martian missions would then need to know how to dock the Orion with these stations.

What about the protective suits astronauts wore on the Moon landing and currently wear when conducting maintenance and repairs in space at  the ISS? Are these suits sufficient for a Mars mission or do astronauts require new technology there as well? Spacesuits, also known as Extravehicular Mobility Units (EMUs), will need upgrades to the primary life support system (PLSS) due to the carbon dioxide atmosphere of Mars. Engineers are also working on upgrades that will provide better oxygen regulation and humidity control. The gringa thinks, “Dear God, please have decent humidity control. We don’t want to see leather skinned astronaut faces with crazy, frizzy hair.” The EMUs also have cooling systems and atmospheric pressure regulators that will be upgraded to accommodate holding more fluids for longer periods of time. Durability will also be a factor. Astronauts traveling to Mars will need these babies to last a long time and be easy to maintain and repair. The new designs will be tested on the asteroid missions before actually going to Mars. It would really suck to be 10 days out on a 500 day mission only to find out your spacesuit was not going to be able to hold 17 months worth of pee. At least on the asteroid you can turn around and go home and change your pants.

Within the next five years, the world can expect to see a new object floating around the moon and regular travel back and forth to study, research and rehearse for even greater events in the future. Within the gringa’s lifetime, I may just witness humans arriving on Mars. Who knows, by the time I’m old and ornery enough that my kids and grandkids have stolen my driver’s license, hidden my car keys and put my car up on blocks, I may just buy a damn ticket.

Sources:

http://www.nasa.gov/content/what-is-nasa-s-asteroid-redirect-mission

http://www.nasa.gov/content/how-will-nasas-asteroid-redirect-mission-help-humans-reach-mars

Photo credit: spectrum.mit.edu

What’s The Matter With Dark Matter?


The first thing that is the matter with dark matter is that it is not “dark” at all. It’s invisible. It neither emits nor absorbs light.

The second thing that is the matter with dark matter is that the fate of mankind depends on something that science only “infers” to exist. This invisible, theoretical, dark matter holds the existence of the universe in its unseen “hands”.  Scientific principles regarding gravity conclude that without this elusive dark matter every star, planet, and all humans as well, would go flying willy-nilly into outer space.

The third thing that is the matter with dark matter is that if it exists, it is then possible that dark matter creates a parallel, invisible world. All the happenings of another civilization could very well be happening right under our very noses and humankind is completely left out of the loop. How utterly curious. Could this parallel world have a cure for cancer? Does cancer even exist there? Are there political factions squabbling for power? Would such a world even need governance? What a fascinating idea.

These matters are why such a hubbub is made within the scientific community about dark matter. The simplest definition of dark matter is that it is nonluminous (dark, invisible) material that is hypothesized (scientifically assumed) to exist in space. It is thought that it can have different forms such as:

  • Cold Dark Matter: particles that are slow moving when compared to the speed of light and interact weakly with ordinary matter and electromagnetic radiation
  • Warm Dark Matter: particles with properties that could possibly be sterile neutrinos and/or gravitinos, and travel faster than cold dark matter but slower than hot dark matter
  • Hot Dark Matter: (no, not an erotic vampire novel) high-energy particles, moving randomly, and do not interact with electromagnetic radiation

Dark matter is theorized to have been created soon after the Big Bang. Therefore understanding dark matter is critical to understanding and supporting the Big Bang theory. Scientists tend to gravitate toward the theory of the creation of the Universe through the building blocks of cold dark matter after the Big Bang. Structures would grow from the bottom up by smaller objects collapsing because of their own gravity. These collapsed structures would then merge and form larger objects with greater mass. Theorizing that the Universe evolved from cold dark matter collapsing and structural fragments merging resolves the questions of how individual galaxies formed.

Warm dark matter and hot dark matter alone could not hold up under scientific scrutiny as to being the original building blocks of the Universe. Although, it may very well have been a mixed bag of all three forms of dark matter creating structures that ultimately resulted in the Universe as we know it today, such a theory, the Mixed Dark Matter theory, is generally rejected.

The universe that is currently known to man consists of about five percent of matter that is classified as “ordinary”. That means that about five percent of the universe consists of matter with mass that is comprised of atoms, or ions, with a nucleus and protons and neutrons. Cosmologists call these “baryons”. This is the matter humans can see.

If ordinary matter only makes up about five percent of the universe, what is the remaining ninety-five percent made up of? About seventy percent is “dark energy”, or, a theoretical energy in the form of a repulsive force counteracting gravity which results in an accelerated expansion of the universe. Dark matter is thought to make up the balance. It sounds like a recipe straight out of Frankenstein’s laboratory: seven cups of dark energy, three cups of dark matter, and a splash of ordinary matter. Voila, Universe!

Detecting dark matter requires a whole new level of thinking. It does not absorb light. It does not emit light. It produces no detectable levels of electromagnetic radiation. If it’s invisible, and cannot be seen with a telescope, how do cosmologists and astronomers know it exists? Scientists infer the existence of dark matter. When astrophysicists measure the mass of large objects in space, such as stars, they discover discrepancies with regard to gravitational effects. When things just don’t add up, the scientists scratch their heads and ask, “Why do these heavenly bodies generate a gravitational effect that should actually be created by an object with greater mass?”

Questions such as these were being asked as early as 1932 when scientist Jan Oort, a Dutch astronomer, suggested dark matter was to blame for the orbital speed of the stars within the Milky Way galaxy. The following year Swiss astronomer, Fritz Zwicky, also believed dark matter was the culprit for the “missing mass” issue. However, it would take another thirty years before compelling evidence could assist the theory of dark matter in gaining ground in the scientific community.

In the 1960’s and 1970’s, American astronomer, Vera Rubin, was deeply entrenched in her controversial work on galaxy clusters. Working alongside Kent Ford, an astronomer and instrument maker, the pair used his spectrometer design to view the light spectrums of spiral galaxies. Their discovery is called the Rubin-Ford effect.

This phenomenon describes the movement of the Milky Way galaxy relative to sample galaxies. Rubin and Ford theorized that the difference in motion of these galaxies, compared to the Milky Way’s motion, was relative to cosmic microwave background radiation. Rubin then focused on studying the rotation curves of galaxies. This led to the discovery of discrepancies between predicted angular motion of galaxies and the actual observed motion of the galaxies.

The gravity of stars within rotating galaxies is what prevents these galaxies from flying apart. Such strong gravitational forces require immense mass. Rubin’s calculations revealed that such galaxies contained much more mass than could be accounted for by the stars they contained. Attempting to explain this discrepancy became known as the “galaxy rotation problem” and led to the conclusion that dark matter must then exist.

One of Rubin’s observations showed that as much as six times more “dark” mass existed in galaxies than ordinary matter. Her work was highly controversial at the time and continued to be studied, tested, debated and discussed. As more astronomers did their own studies with conclusions that supported Rubin’s assertions, it became well established within the scientific community that most galaxies are predominately “dark matter”.

The result of Rubin and Ford’s work has led to innovative methods of observing galaxies. One such method, gravitational lensing, was used to examine background objects within the Bullet Cluster in attempts to identify the presence of dark matter. Light bends as it travels away from the source to the observer. It is the mass of the observed object which causes the light to bend. The greater the mass, the stronger the gravitational field it creates, thus a greater degree of bending of the rays of light. When light is then bent to a degree greater than would be indicated by the known mass of the astronomical object, dark matter is then assumed to be at play to account for this mathematical anomaly.

Scientists have used gravitational microlensing to conduct large searches throughout the Milky Way galaxy. Astronomical evidence indicates that the universe contains much more matter than what is visible to mankind. Some scientists have even speculated that a parallel world is possible that consists of dark matter and can only interact with the universe as we know it through gravity.

When measuring the velocity of rotation as compared to the distance from the center of a spiral galaxy, such as the Milky Way galaxy, the mathematical discrepancy reveals that the cluster’s mass consists of very little of the ordinary matter objects that are visible. Scientists then suggest that dark matter is concentrated in a halo formation surrounding the visible matter. A dark matter parallel world could perhaps be found in the “halos” around astronomical objects. Since dark matter contains no atoms, like ordinary matter, it cannot interact with ordinary matter through electromagnetics. Dark matter contains no electrical charge. Hence, gravity is the only interactive relationship between dark matter and ordinary matter as the theory is understood at this time.

Spiral galaxies are not alone in containing dark matter. Studies conducted with gravitational lensing reveal that dark matter may very well be present in elliptical galaxies. Within dark halos that surround such galaxies, X-ray emissions indicate atmospheric extensions of hot gas which could support the existence of dark matter. Using X-ray emissions to estimate dark matter existence is achieved by measuring the energy and fluctuation of the X-rays. These measurements can be used to estimate the temperature and density of the gas producing the X-rays as well as the pressure of the gas. A profile of mass can be created by assuming that the gas pressure balances with the present gravity. Discrepancies would then be attributed to dark matter.

As with anything, there are, of course, exceptions to the rule. Globular clusters are thought to perhaps contain no dark matter. Cardiff University astronomers discovered galaxy VIRGOHI21 in 2005 and believe it to be made up entirely of dark matter and absent of any visible stars. So, there is diversity and oddities even amongst the stars.

Dark matter within our very own Milky Way galaxy is, apparently, “wimpy”. Every second of every day millions, perhaps even billions, of weakly interacting massive particles, also known as WIMPs, pass through this globe humans call home. Experiments of detection are vigorously underway searching for these invisible invaders. Because WIMPs do not interact with matter, it is thought that they can be detected by measuring energy and momentum discrepancies as they zip about, collide and annihilate each other. This is one of the studies conducted in supercolliders.

What does the discovery of dark matter mean for mankind? For the scientific community, it is simply another wonderful puzzle to be solved. For the regular person moving through life every day, it might mean a new awareness of the possibility of an invisible world right next to you. Average people who simply want to rise from a chair and cross the room may find themselves compelled to politely mutter the words, “Please excuse me.” These words may appear to be uttered to an empty room containing no one who needs their pardon begged. No, these people are not crazy and talking to themselves, they are simply considering that the room could contain invisible, dark matter co-habitants that find it very disturbing when a human walks right through them without even a, “How do you do?”