lesson1: is the collectio of large and small odies that orbit our central star

lesson1: is a spherical body that orbit the sun

lesson1: is a large celestial body that is compose of gas and emits light

lesson1:is a lagre collectionof stars, gass and dust that is held togehter by gravity

Lesson1: The four inner planets are...

Lesson1: Put the planets in order from the sun.

lesson1:is the distance that light travels through space in 1 year

lesson1: What type of galaxy is this?

lesson 2: actual brightness of a star

lesson 2: is the measure of star's brightness as seen form Earth

lesson 2: is the measure of how bright a star would be if the star were located at a standar distance.

lesson 2: What color are the coolest stars?

lesson 3: All stars begin their life in a

lesson 2: What determines the color of a star?

lesson 3: The stable period (spend most of their lives) of a star’s life cycle is called...

lesson 3: Is the hot, dense core of mattr that remains from the collapse of a low mass.

Lesson 3: Our sun is currently in what star stage?

Lesson 3: this is...