December 15, 2008

Many astronomers believe that the universe looks some what similar in all directions even though they only have images of the north and south. Even though there are MANY galaxies the hdf took ten days to send a light to get a picture and the hdfn took eleven days. So when they finally reach us we are seeing things that have been about 2 billion years old.

Aliens

I'm back and forth on if i believe there are aliens out there. There reason I think there might be is because there are MANY galaxies out there and how could we be the only ones. But also I believe there aren't aliens because you think we would have heard of them by now or spotted them, but also like i said there are many galaxies. I also don't beleive that Drake equation. I think theres no point.

Video over Nova Orgins

In this video it talked about the steady state theory of the universe which is the idea that the universe never changes. It also talked about COBE which how i describe it is a flash of light that makes the Earth visible. Also microwave radition sent out waves that interfered with telephone callers which helped us figure out what happened. Also the WMAP shots off into space and CBI is a tin arragement on top of a mountain.
WMAP traveled beyond Jupiter during its three month journey. Also i leared that they aren't sure where the iron came from. Also i learned that the things stars send out are the building blocks of life, which can be how humans are made of stardust. Also the Deep Extragalactic Imaging Multi-Object Spectrograph takes very clear pictures which helps us study everything a little bit better.

Stellar Evolution questions

1. No
2. That is needs more time than mass in its life cycle
3. No
4. It is the most common type of star in the Galaxy. They are observed to be strongly variable X-ray sources. They have a low mass.
5. They all go through a cycle

The videos helped by giving information about the cycle of all the stars. It also told us how not all stars turn into black holes. It also talked about a mass and time cycle just like the picture we used to get the answers to our questions.

BlackHoles

1. An event horizen is the distance, which can be represented as an imaginary sphere around the black hole. And an accretion zone is the area that the hole force gravity has an affect on.

2. Black hole is defined as a escape velocity that would have to be attained to escape from the gravational oull exerted upon an object.
Speed of light is a constant in a empty space.
Escape Velocity is the speed at which an object on the surface of a body must be propelled in order not to returnto that body under the influence of their mutual gravational attraction. It may also be defined as the speed required to propel an object on the surface of a body into a parabolic trajectory about that body.

3. A black hole is an object, typically a collapsed star, whose gravity is very strong that its escape velocity exceeds the speed of light. Since nothing is known to exceed the speed of light., nothing can escape from a black hole. they all have to deal with each other.

4. There are Stellar black holes, Supermassive black holes, and miniature black holes.

5. They thought black holes were invisible stars.

6. Because of the Hubble Space Telescope we are able to provide evidence of supermassive black holes that lurk in the center of some of our galaxies

7. The volume of the black hole is huge. Black holes have no mass.