Stars Are Cool. No, Really, They Are


When the gringa’s dear readers think of a star, what do you think of? The Sun? Polaris? Alpha Centauri?  And what do you think would happen if you reached out to touch the Sun? You’d probably get vaporized, right? Well, depending on the star, not necessarily. In fact, if you touched the right star it might be a sensation more like when you roll over in bed and find the cool spot.

Brown dwarfs are cold stars. There are 14 that NASA believes are cool enough to touch. Cool! They are also the oldest stars in the Universe. I guess stars are kind of like people. Old folks with poor circulation are generally cold all the time. Stars get old and cold, too. Out of all the old, cold, brown dwarf stars in the Universe, it’s the Y-dwarfs that are even cooler than the average human’s body temperature. Y, you may ask. Well, the gringa will tell you why the Y is the way that it is.

Not only are they old but they are failures. Poor Y-dwarfs. They must have very low self-esteem. Perhaps that is why they don’t shine as brightly as other stars. They have grown old and are failures as stars. The gringa feels very sorry for the poor, little things.

Because their cores are not very dense they can’t fuse loads of atoms within. That means they don’t burn as hot and brightly as other stars. The gringa finds it very amusing that the denser a star is the brighter it is. It doesn’t seem to work that way in humans.

If Y-dwarfs are such failures at being stars, the gringa wonders if they should be considered stars at all. Do we have a Pluto prospect in the future? Just as Pluto got demoted from planet to dwarf planet, Y-dwarf stars may very well face the possibility of being re-classified. In the future scientists may decide they don’t meet all the guidelines of being a star. The gringa thinks this is a wonderful possibility for Y-dwarfs. Whereas poor Pluto suffered a demotion, the Y-dwarf could get better news. They could go from being failures as stars to being over-achievers for whatever it is they may become!

However, it may take astronomers quite some time to collect enough data in their studies. Their failure to shine bright like a diamond in the sky means it is difficult to view and study them. It’s practically impossible to study them at all with a telescope dependent on visible light. To take productive peeks at Y-dwarfs NASA had to construct an infrared telescope and mount it to an orbiting satellite. And that is why the Universe is wiser thanks to these cold, little star failures, because of Wide-field Infrared Survey Explore (WISE) that studies them in the heavens.

Source:  www.nasa.gov

Image Credit:  www.jpl.nasa.gov

 

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Calling The North Star! Come In North Star! Do You Read?


Have you ever wondered if you got stranded on a desert island and launched a desperate plea for help through ye aulde “message in a bottle” method just how long it might take for someone to receive your communique. And if the hands it eventually fell into would even be able to read your language and decipher the message? That’s kind of the case anytime a messaging project is embarked upon launching human messages into outer space. And the latest one has been undertaken by the European Space Agency (ESA).

A Simple Response to an Elemental Message” is sending a radio message to the North Pole star, also known as Polaris. The ESA believes that mankind is living in what they dub “The Critical Decade”. They posit that, as has been historically proven, ecological decisions today will affect future generations, for bad or good depending on what we choose. Do we set our future grandchildren up for failure or success? For mere survival or a flourishing civilization? The world’s response to the UN Climate Change Conference of last year will decide what the next decade will mean for the human species as an entire collective.

The ESA’s “Simple Response” project invites every single human to participate. Ask yourself the question, “How will our present environmental interactions shape the future?” Form your response and contribute your own perspective to the project. Later this fall, all contributions will be transmitted from the ESA’s station at Cebreros, Spain and sent on a journey at light-speed into outer space. The voices of the human race will forever be encoded into a beam of light. Will it be the last hurrah of a race bent on self-annihilation because of an obsession with comfort and consumerism?

As of the gringa’s composition of this post there were 3,139 contributions. By visiting the project’s website and clicking on the “Contribute” tab, Earthlings can fill in the blanks and contribute their own two cents worth on the subject of climate change. The gringa contributed the following under the name: Gringa of the Barrio, Houston, TX:

“If we don’t act now, this message may be the last gasp of a race bent on self annihilation through the obsessions of creature comforts and consumerism. If more intelligent beings are out there, please come help us save us from ourselves.”

After your contribution you may want to check out the mission statement of the program. The gringa, usually a light-hearted person who is perpetually positive, came away quite sobered. The reality of this project is that it may very well be, in the future, an archaeological relic to be discovered by some alien race of the future. It may be a message that inspires these ETs to travel to our home world and try to reconstruct the history of a civilization of fools who destroyed themselves because they arrogantly believed they were simply too great to fail.

 

Source: www.asimpleresponse.org

Image credit: 2.bp.blogspot.com