Astrochemistry by Ensign February 20, 2021 0 The branch of science that explores the chemical interactions between dust and gas interspersed between the stars.
Astronomical Season by Ensign February 20, 2021 0 Astronomers and scientists use the dates of to mark the beginning and end of seasons in a year. In the ...
Astronomical Unit by Ensign February 20, 2021 0 The average distance from Earth to the Sun, slightly less than 93 million miles (150 million kilometers).
Astronomical Unit (AU) by Ensign February 20, 2021 0 A unit of measure equal to the average distance between the Earth and the Sun, approximately 93 million miles.
Atmosphere by Ensign February 20, 2021 0 A layer of gases surrounding a planet, moon, or star. The Earth's atmosphere is 120 miles thick and is composed ...
Atmospheric Phenomena by Ensign February 20, 2021 0 Atmospheric phenomena occur when light, usually from a natural source, but sometimes from artificial sources, is reflected or refracted as ...
Atom by Ensign February 20, 2021 0 The basic building block of matter. It is made of protons, neutrons, and electrons. There are many different kinds of ...
Aurora by Ensign February 20, 2021 0 A glow in a planet's ionosphere caused by the interaction between the planet's magnetic field and charged particles from the ...
Aurora Australis by Ensign February 20, 2021 0 Also known as the southern lights, this is an atmospheric phenomenon that displays a diffuse glow in the sky in ...
Aurora Borealis by Ensign February 20, 2021 0 Also known as the northern lights, this is an atmospheric phenomenon that displays a diffuse glow in the sky in ...
