A cloud of dust and gas that often will form into stars.
What is a nebula?
Bruno, Ptolemy, Copernicus, Kepler
What is Ptolemy? B/c the other three supported the heliocentric model.
The early astronomer who presented the geocentric model, or the model that all planets, including the sun, orbit the Earth.
Who is Ptolemy?
The Milky Way galaxy is said to contain this many stars.
What is between 100-400 billion stars?
Spiral, spherical, elliptical, irregular
What is spherical? B/c the other three are types of galaxies.
The early astronomer to discredit the geocentric model with his heliocentric model.
Who is Copernicus?
The Milky Way Galaxy is estimated to be this many light years across.
What is 130,000 Light Years?
The explosion of massive or super massive stars after fusing elements up to iron.
What is a supernova?
Red giant, white dwarf, black dwarf, supernova
What is supernova? B/c the other three are stages in the life cycle of sun-like stars.
Early astronomer who supported the heliocentric model after inventing the telescope.
Who is Galileo?
Oxygen, energy, liquid, heavy elements
What is oxygen? B/c the other three are necessary for life to evolve.
First early astronomer to claim planets do not orbit the sun in perfect circles.
Who is Tycho Brahe?
The distance Earth is from the center of the Milky Way?
What is 26,000 light years?
Helium, carbon, oxygen, gold
What is gold? B/c the other three are only formed from sun-like stars.
Early astronomer to discover planets revolve around the sun in ellipses, or oval shaped patterns.
Who is Kepler?