Its a link to Google Earth, and shows their top 20 favorite images taken by the Hubble Telescope. Some of these images were shown in class.
Saturday, April 24, 2010
Thursday, April 22, 2010
Why I don't like the theory that if you travel through a black hole you'll reach another place...
This is an image from the movie star trek, where the space ship travels through a black hole into a parallel universe. While this would be really cool if that were true, this particular theory makes me rather skeptical.
If you were to go anywhere near a black hole, the gravity would pull you in to such a dense amount of space, there'd be no way to not be crushed under all that pressure....
even light can't survive it. How would a ship? Even one as big as this one!
Droid Commercial Reminds me of Black Hole!
This video reminds me of the image of the black hole starting at :23.
Age of the Milky Way
This model shows what we think the Milky Way Galaxy looks like.
As shown in the model, the middle of the galaxy has the oldest stars (M stars),
the outer galaxy has the youngest stars (O stars).
Globular clusters are red. Space dust makes up the heavier elements.
Space Time Continuum
So at first I couldn't wrap my mind around this.
Okay so i still can't really wrap my mind around it. But its some better than before.
i was looking at this model of space time with a large mass object. In my head I kept trying to make time literally move faster or whatever.
But I realized that it just takes less time to cover the same amount of space because the pull of gravity is stronger. How did Einstein figure this out!?!?
Actually...i'm not sure i really want to know the answer to that one...
How Stars Are Born *(Review for Me)
If a clump of interstellar matter is cold and dense enough, it will begin to collapse due to gravitational attraction.
If the clump is massive enough, it will evolve into a main sequence star.
1.In a cold, dark nebula, gas atoms and dust particles move so slowly that gravity can pull them together.
2. Gas and dust begin to condense into clumps, forming the cores of protostars.
3. As the cores condense, their density and temperature increase.
4. Protostars continue to heat up and accrete matter from nebula. They begin to glow to their increasing temperature.
5. Temperature at the center of a protostar becomes sufficiently high. Thermonuclear fusion of hydrogen into helium begins. The star is officially in the main sequence at this point. The mass that is continuing to fall on to the star forms an accretion disk.
6. In the T Tauri stage, the young star ejects mass into space in a bipolar outflow. A stellar wind blows away the remaining parts of the nebula that surround the star, exposing the star to space.
7. The ejected mass can induce a shockwave in the surrounding interstellar material, triggering formation of other stars.
Processes that cause the star to lose or gain mass come to an end, and the star stabilizes as a main sequence star in hydrostatic equilibrium. The remnants of the accretion disk may remain as proto-planetary disk, from which a system of planets may form around the star. (But i thought all the stuff just got blown away by the stellar wind?!)
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