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!

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.

Astronomy Project

This is my project on all the list of Astronomers.

Aristotle-
384-322 B.C.E.
He discovered the solar eclipse
He also was one of the first to claim that the world is round.

S. Chandrassekhar
1910-1995
In 1983 he received the Nobel Prize in physics for his knowledge on the death stars.
In 1999 NASA named it’s orbiting x-ray telescope the Chandra observatory after him.

Annie Cannon
1863-1941
Discovered three hundred variable stars.
Cataloged spectral types of hundreds of thousands of stars.
Founded the Annie Jump Cannon prize.

Gailieo Galilei
1564-1642
Studied the way objects accelerate.
August 25, 1609 Galileo demonstrated a telescope with a mag. of 9x (the first real telescope)
He showed that the velocities of falling objects does not depend on what they weigh.
He was considered a heretic by the church in Rome because he believed that the planets go around the sun and not the earth.

Robert Wilson-
1936-
1978 won a Noble Peace Prize in physics.
Worked with comic background radiation.

Nicolaus Copernicus
1473-1543
He developed the Heliocentric
He figured out that the earth is a planet and all the planets circle the sun.

Albert Einstein
1879-1955
He determined how the max speed of light affects measurement of time and space.

Clyde Tombaugh
1906-1997
On March 13, 1930 the Tombaugh discovered the planet Pluto.
During his search for planets he also discovered 3000 asteroids.

Johannes Kepler
1571-1630
He was a believer in the heliocentric theory.
He also developed three laws of planetary motion.

Edwin Hubble
1889-1953
He is the astronomer the Hubble space telescope is named after.
He started the theory of the big bang.

Isaac Newton
1642-1727
Some people consider him to be the “father of modern science”.
There is a story that he discovered gravity when an apple fell and hit him on the head.
He also helped start calculus.

Tycho Brahe
1546-1601
Some people call him the father of modern astronomy.
He spent his life doing work on astronomical tables.

Bode
1747-1926
Developed Bodes law, the way to measure the distance of planets from the sun.
He also ran a observatory in Berlin.

James Van Allen
1914-2006
Van Allen raditation belts were named after him.
He was from Iowa.
He worked with rockets.

Albert Michelson
1852-1931
He discovered the speed of light.
Developed an interferometer to measure light.
In 1907 he won the Nobel Prize.

Pope Gregory XII
1327-1417
He was the pope for nine years.
He helped to end the fighting in Europe.




Stephen Hawking
1942-
Expert on black holes.
He is also a professor of mathematics at Cambridge University.


Carl Sagan
1934-1996
Was in the pbs show Cosmos.
He later won a Pulitzer Prize.

Ptolemy
2nd century A.D.
He wrote four books on astronomy.
He explained how to figure out the lines of latitude and longitude.

Hipparchus
170 B.C.-120 B.C.
He invented the way to divide stars based on how bright they are.
He was one of the first to figure out trigonometry.


Sources: Voyages Book
And Answers.com