The EMS (electromagnetic spectrum)
Astronomy uses _____ parts of the electromagnetic spectrum.
All
Spiral
How large do astronomers guess the universe was before the Big Bang?
A thousand times smaller than a pin head.
When did the first stars start to form?
100 million years after the Big Bang.
Who took the first x-ray?
Wilhelm Rontgen
What kind of stars do elliptical galaxies have?
Old Stars
What way are all galaxies moving?
away from one another
What do all electromagnetic waves have in common?
They travel at the same speed.
What is the frequency of a wave?
How many times it oscillates per second.
Where is a supermassive black hole thought to be located?
In the center of a galaxy
How long did the temperature take to drop 1 billion degrees Celsius?
3 mins
_________ was common between galaxies after the Big Bang.
Collisions
What two wavelengths can pass through the Earth's atmosphere completely?
Visible and Radio waves
How long is it expected for the universe to keep expanding?
forever
Which space telescope collects information using x-rays?
Chandra X-Ray Observatory
List the types of radiation in order from least to greatest.
Radio Waves
Microwaves
Infrared
Visible Light
Ultra Violet
X-Rays
Gamma Rays
Which type of galaxy used to be a spiral?
Lenticular
What evidence is there of the Big Bang?
a faint glow in space caused by cosmic background radiation
What is the name of the supermassive black hole at the center of our galaxy?
Sagittarius A