Tag Archives: astronomy

A visual history of the universe, because.

I’m not totally sure what this tells us (or astronomers), and I certainly am not clued enough to understand it, but damn is it still cool:

Scientists have created the first realistic model of the universe, capable of recreating 13 billion years of cosmic evolution. The simulation is called “Illustris,” and it renders the universe as a cube (350 million light-years on each side) with, its creators say, unprecedented resolution: The virtual universe uses 12 billion 3-D “pixels,” or resolution elements, to create its rendering. And that rendering includes both normal matter and dark matter.

How they use it? The Atlantic continues:

With Illustris, paper co-author Shy Genel explains it, “We can go forward and backward in time. We can pause the simulation and zoom into a single galaxy or galaxy cluster to see what’s really going on.”

Illustris has 41,000 galaxies in its simulation—a mix of spiral galaxies like our Milky Way along with elliptical galaxies. It represents five years of work on the part of the scientists from, among others, the MIT/Harvard-Smithsonian Center for Astrophysics and the Heidelberg Institute for Theoretical Studies in Germany.

And naturally, that Orb-like soundtrack is by a band from Germany, Moonboot.

The shit they can do, I swear

This does not adequately answer the request to get my butt back in gear, but it’s a start:

“Finding a second Earth could happen any time now.”

It’s not quite what that sentence makes it out to be — it’s not like we’re going to find E.T. and his family, tending to alien crops and still faithfully maintaining that early ’80s Huffy bike without proper parts. But the way they go about detecting planets around distant, distant (how many repetitions means “bazillion light years”?) stars is incredible:

COROT is the COnvection ROtation and planetary Transit satellite, scanning thousands of stars to see the tiny dips in brightness caused by planets.  HARPS is the High Accuracy Radial Velocity Planet Searcher, a super-sensitive spectrograph installed on a Chilean telescope to accurately identify how fast a wavelength source moves.  Between them, they were able to identify the location of the planet and work out it’s orbital radius and speed, thereby working out the mass and size.

At first all they could find was Jupiter-like planets: Giant, gaseous ones that, like Jupiter, dwarf mother Gaia in size and are completely inhospitable to any form of life we can conceive of. But now they’re getting even more sensitive, to the point where they’ll be able to detect tiny little rock-based planets like ours.

And how. I mean, the shit they can do, I swear: They’re coordinating hyper-sensitive telescopes to detect tiny blips in the light reaching us from stars millions of light years away. (We lay people think of telescopes and “light” as what you can see and magnify for our eyes, but really the visible realm is just a fraction of the whole spectrum of detectable wavelengths, so the best stuff telescopes can detect is often stuff we couldn’t “see” anyway, such as with X-ray telescopes.

(This entire paragraph is a very amateurish, totally unverified way of explaining it, by the way. But still: Look at a faint star, then imagine there’s an even fainter star in the blackness next to it — because there always is — and scientists are detecting it and the blips in light to determine the size of a planet orbiting it, even though planets are just a teency fraction of the size of the stars they orbit. ‘Mmkay, that was amateurish, too.)

So I’ll stop the amateur hour here and just quote the two parts that are right up my alley in terms of how I view this place I’m renting for my lifetime:

The great thing about outer space? It’s absolutely full of fantastic stuff just waiting for us to be able to see it:  every time we improve our observations, either the equipment or analysis, something new and brilliant jumps out of the universe saying “Here I am!”  Now fans of interplanetary ideas have been rewarded with the very first rocky planet outside the Solar System.

[snip] … It’s awesome stuff for scientists.  Yet another example of how we’ll never be bored, how the universe is simply stuffed with things waiting for us to detect them.

Hell yes.

By the way, that Daily Galaxy is a cool site. Lot’s of mindblowing stuff, if you’re worried about your ancestors several million years from now.