Galaxy
Place in space where gravity pulls so much that even light can not get
What is a black hole
Dark regions on the surface of photosphere
What are sunspots
The movement of the earth around the sun is called
What is Revolution
The two most common elements found in stars
Hydrogen and Helium
A body of gases that gives off a tremendous amount of energy in the form of heat and light
What is a star
A galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms is called a ________________ galaxy.
What is spiral
Nicolaus Copernicus came up with the following theory that the sun was the center of the solar system
What is Heliocentrism
The degree the Earth is tilted
What is 23.5 degrees
The process by which a star changes over the course of time
What is Stellar Evolution
Small rocky body orbiting the sun
What is asteroid
The brightness of a star is called it's
magnitude
The visible surface of the sun
What is the photosphere
When the sun is directly overhead at the Tropic of Cancer
What is summer solstice
The stage when stars begin as a cloud of gas and dust is called
What is Nebulae
The main asteroid belt lies between which two planets
What is Mars and Jupiter
This is used to show the relationship between a star's temperature and its luminosity
What is the Hertzsprung-Russell (H-R) Diagram
Made up entirely of plasma
What is the Sun
When the sun is directly overhead at the equator, 12 hours of daylight and 12 hours of darkness
What is the Equinox
90% of life spent in this stage of a star
What is main sequence
According to this theory the Earth was thought to being the center of the solar system
Geocentrism
The galaxy the Earth is located in
What is the Milky way
The outermost portion of solar atmosphere
Space Telescope named in honor of Edwin Hubble
What is the Hubble space telescope
After the death of a Red Giant star it becomes a
What is white dwarf
This scientist is credited with the idea of elliptical orbits of the planets
Johannes Kepler