Is there life out there?

I think that there could be life out there. If we haven't even discovered everything how can we say there isn't any planets like us in other galaxies. Also if God could make life here on earth i don't see why it isn't possible that he made life somewhere else. There is so much that we haven't discovered yet that it's very possible there is somewhere with life.

Black holes

a) what are the parts of a black hole? jets of gas, accretion disk, and sn event horizon
b) how is gravity related to a black hole? Because gravity is what is used to pull obects into a black hole.
c) how can we see the holes if they are black? They are invisible but you can find them by observing the stars and gas around it.
d) what's a Swarzschild radius? It is a radius for a mass given where if you could compress the mass to fit in it no force could stop it from collasping. Anything smaller than its swarzschild radius is called a black hole.
e) how do Einstein's theories relate to this? because his laws where what was used to study and eventually find the black holes.

Hubble Telescope

A)It will make them reflect visible, infra-red and ultraviolet light.
C) The light is 13.6 billion lightyears
D) The Hubble telescope is a Cassegrain reflector and uses a primary and secondary mirrors to bounce off of each other.

What is up with Mercury?

The lab was sending signals to Mercury and getting signals back
1.) the rotation rate of Mars means that, by sending radio signals out, that the distance between the signals is the rotation rate.
2.) that the closer the planet is to us the more intense the radio waves will be.
3.) the five slices of data mean that we can gather more information about Mercury and learn more about it and it's rotation rate.

Annie Cannon

I don't think I could ever be like Annie Cannon, in the sense that I don't think I could ever do just one thing for the rest of my life. I would like to spend my time doing many different things and probably changing jobs. I would get bored of the same thing every day.

What is it?

I think that the Tunguska explosion was nuclear blast.
1. there were no craters of pieces of meteorite's
2. the trees knocked down in a circle could just have been from the bast not a UFO
3. radiation damage would be caused by nuclear testing not UFOs

Electromagnetic Radiation

The Radio-
Without radio waves my life would be different because i love listening to music. And when I'm in the car or at home i always have the radio on. So without radio waves my car rides would be very boring!