Whole Earth Telescope

Uploaded by UnivDelaware on 03.06.2011

This star is GD358 and it's this one That little guy there.
And, he is what's called a white dwarf
Which means he is a star that's much more
evolved than the sun. And it's shed all of its outer layers and it's pretty much just the core
of the star that's left. It's about the size of the Earth but it's almost the mass of the sun.
So it's a very, very dense star.
And, it's pulsating and instead of pulsating in and out it's sloshing side to side.
And we watch the brightness change over time. And by watching how that brightness changes
we can then determine what the interior of the star is like.
We have observers from Russia. We have observers from China. We have observers
from Poland. We have observers from Germany, Brazil.
We have some people in South Africa for this run.
We have some people who are observing in Turkey right now. So, we really have a huge international collaboration.
What the observer does during the night is he takes thousands of these images.
This particular one is five seconds. And so, he observes the star all night long
so you end up with thousands of these individual images.
And what we do is we take all of these images and we go through them one at a time and you can pick out how bright the star is in every image.