Teen Choices Unit 3 L 2.1

unpleasant, not comfortable

the branch of science that deals with celestial objects, space, and the physical universe as a whole.

a ring of light crossing the sky, made up of vast numbers of faint stars.

make you very impressed and want to know more; fascinate

microorganisms, especially bacteria

a natural situation of reddish or greenish light in the sky,

a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.

An Italian astronomer, physicist and engineer, father of observational astronomy, an inventor of the telescope.

a group of stars forming a recognizable picture, that is traditionally named after how it looks

a colorless, odorless flammable gas that is the main constituent of natural gas. We use it for heating houses.

the outside of a thing or planet is the ____

a vehicle used for traveling in space.

make you want to do something, especially something creative.