A dark area of gas on the sun,s surface that is cooler than surrounding gases.
What are sunspots?
100
A galaxy shaped like a round or flatted ball.
What an elliptical galaxy?
100
The Milky Way Galaxy is the galaxy that contains our solar system.
What is the Milky Way Galaxy?
100
He discovered the three laws of motion and universal gravitation.
Who is Isacc Newton?
200
When there is a full moon and the earth is directly between the moon and the sun.
How does a Lunar Eclipse?
200
Huge loops of gas on the sun.
What are prominences?
200
Has a bulge int he middle and arms that spiral outward, like pinwheels.
What is a Spiral Galaxy?
200
An object that orbits the Sun and is spherical , that has not cleared the area of its orbit.
What is a Dwarf Planet?
200
He discovered the dwarf planet Pluto in 1930 and the Kuiper belt.
Who is Clyde Tombaugh?
300
Occurs when the moon phases directly between Earth and the Sun.
What are moon phases?
300
The inner layer of the sun's atmosphere.
What is a photosphere?
300
Primarly contains individual old stars and clusters of old stars.
What is a Halo?
300
American astronomer who predicted the existence of a planet beyond the orbit of Neptune and initiated the search that ended in the discovery of Pluto.
Who is Percival Lowell?
400
Has no moons.
What is Mars and Venus?
400
The outermost layer of the sun's interior.
What is the Convection Zone?
400
The stars, gas, and dust are organized into a "buldge", a "disk" containing "sprial arms", and a "halo".
What are parts of a galaxy?
400
The name often given tot he four inner planets: Mercury, Venus, Earth,and Mars.;
What are terrestrial planets?
400
a Renaissance mathematician and astronomer who formulated a model of the universe that placed the Sun rather than the Earth at its center.
Who is Nicolaus Copernicus?
500
This Planet has three moons.
What is Pluto?
500
A region of very tightly, packed gas where energy moves mainly in the form of electromagnetic radiation.
What is the Radiation Zone?
500
A starburst galaxy about 12 million light-years away in the constellation Ursa Major. It is about five times more luminous than the whole Milky Way and one hundred times more luminous than our galaxy's center.
What is the Cigar Galaxy?
500
Period of revolution of Venus.
What planet takes 224.7 earth days for its resolution?
500
He discovered and demonstrated that the Earth orbits the Sun.