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!

Notes on stellar spectra

1. Absorption spectra are created when a gas passes in front of an emitted photon of light. A line spectra appears when no gas is available. What type of spectra are more likely to be produced when light travels to earth? An absorption because of the ozone layer there is gas between us and stars.

2. Is parallax more likely to appear for closer or further stars? Why do you believe this? Closer. when you are driving and there is a fence post and a mountain the fence will look it is moving and the mountain will not because of the distance.

3. A Cepheid variable is a star that allows us to measure distance using a period? What variable are we using for the period? the brightness of the stars is what we use.

4. What is the the nuclear engine in the heart of a star, and how does it work? hydrogen because like with our star, the sun, the hydrogen is squeezed and it fuses and makes helium.

5. How is magnitude different from a star's intensity? Why? magnitude stays the same no matter what. Intensity changes when you move farther or closer.