celestial objects
Celestial objects are any object that exists in space, such as a planet or star.
fusion
A nuclear fusion is the process of energy production in which hydrogen nuclei combine to form helium nuclei.
AU
The Astronomical Unit is used to measure the distances between planets. The AU is equivalent to the average distance between the earth and the sun (150 million kilometers). This means that earth is 1 AU from the sun.
light year
A light year is a unit of distance. It is the distance that light travels in a year.
nebula
A vast cloud of gas and dust, which may be the birthplace of stars and planets.
supernova
A massive explosion in which the entire outer portion of a star is blown off
revolution
Earths revolution around the sun is 365.24 days.
rotation
The Earth takes one day to make one full rotation on it axis. (24 hours)
eclipse
An eclipse is when one celestial object passes directly in front of another celestial object as seen on earth.
photosphere
The surface layer of the sun
sunspot
An area of strong magnetic fields on the photosphere
International Space Station
The ISS (international space station) is a space-based laboratory which provides many opportunities for research in the microgravity environment. Crew members on the ISS conduct experiments such as growing protein crystals.
meteoroids
A piece of rock moving through space, rocky chunks broken off asteroids and planets.
meteors
A meteoroid that hits earth’s atmosphere and burns up.
meteorites
A meteoroid that is large enough to pass through earth’s atmosphere and reach the ground without being totally burned up\
