E, M, S Vocab - Science Flashcards
Rotation
Spins or turns around a point, located at its center
Revolution
Movement of a planet around the Sun
Planet
Any object in orbit around the Sun, is stable due to its own gravity
Galaxy
Huge collection of gas, dust, and billions of stars, including the solar system
Solar System
Consists of Sun and everything that orbits it
Astronomical Unit (AU)
the distance between earth and sun
light-year
the distance light travels in one year
gravity
an invisible force that pulls objects towards each other
molecular cloud
an interstellar cloud of gas and dust in which molecules can form, mostly H2 (hydrogen)
protoplanetary disk
rotating circumstellar disc of dense gas and dust surrounding a new star
irradiance
the output of light energy from the entire disk of the sun, measured at the earth
a/an-
without
luna-
moon
therm-
temperature/heat
auto-
done or made by themself
