Another Earth - Blog Posts
The search for another Earth is super cool even if it might never end lol
But like, Aliens.
WANT MORE? GET YOUR HEAD STUCK IN THE STARS AT MY BLOG!
Are We Alone? How NASA Is Trying to Answer This Question.
One of the greatest mysteries that life on Earth holds is, “Are we alone?”
At NASA, we are working hard to answer this question. We’re scouring the universe, hunting down planets that could potentially support life. Thanks to ground-based and space-based telescopes, including Kepler and TESS, we’ve found more than 4,000 planets outside our solar system, which are called exoplanets. Our search for new planets is ongoing — but we’re also trying to identify which of the 4,000 already discovered could be habitable.
Unfortunately, we can’t see any of these planets up close. The closest exoplanet to our solar system orbits the closest star to Earth, Proxima Centauri, which is just over 4 light years away. With today’s technology, it would take a spacecraft 75,000 years to reach this planet, known as Proxima Centauri b.
How do we investigate a planet that we can’t see in detail and can’t get to? How do we figure out if it could support life?
This is where computer models come into play. First we take the information that we DO know about a far-off planet: its size, mass and distance from its star. Scientists can infer these things by watching the light from a star dip as a planet crosses in front of it, or by measuring the gravitational tugging on a star as a planet circles it.
We put these scant physical details into equations that comprise up to a million lines of computer code. The code instructs our Discover supercomputer to use our rules of nature to simulate global climate systems. Discover is made of thousands of computers packed in racks the size of vending machines that hum in a deafening chorus of data crunching. Day and night, they spit out 7 quadrillion calculations per second — and from those calculations, we paint a picture of an alien world.
While modeling work can’t tell us if any exoplanet is habitable or not, it can tell us whether a planet is in the range of candidates to follow up with more intensive observations.
One major goal of simulating climates is to identify the most promising planets to turn to with future technology, like the James Webb Space Telescope, so that scientists can use limited and expensive telescope time most efficiently.
Additionally, these simulations are helping scientists create a catalog of potential chemical signatures that they might detect in the atmospheres of distant worlds. Having such a database to draw from will help them quickly determine the type of planet they’re looking at and decide whether to keep observing or turn their telescopes elsewhere.
Learn more about exoplanet exploration, here.
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You know that story of the Russian cosmonaut? So, the cosmonaut, He's the first man ever to go into space. Right? The Russians beat the Americans. So he goes up in this big spaceship, but the only habitable part of it's very small. So the cosmonaut's in there, and he's got this portal window, and he's looking out of it, and he sees the curvature of the Earth for the first time. I mean, the first man to ever look at the planet he's from. And he's lost in that moment. And all of a sudden this strange ticking... Begins coming out of the dashboard. Rips out the control panel, right? Takes out his tools. Trying to find the sound, trying to stop the sound. But he can't find it. He can't stop it. It keeps going. Few hours into this, begins to feel like torture. A few days go by with this sound, and he knows that this small sound... will break him. He'll lose his mind. What's he gonna do? He's up in space, alone, in a space closet. He's got 25 days left to go... with this sound. So the cosmonaut decides... the only way to save his sanity... is to fall in love with this sound. So he closes his eyes... and he goes into his imagination, and then he opens them. He doesn't hear ticking anymore. He hears music. And he spends the sailing through space in total bliss... and peace.
Another Earth (2011)