Astronomy Vocab

process that powers the sun and stars; where two atoms of hydrogen combine to form helium atoms

• fission

• fusioin

• nutation

• precession

sun is the center of the solar system

• heliocentric

• geocentric

• revolution

• rotation

the formation of planets

• geocentric

• fission

• nutation

• accretion

point between two objects where they balance each other

• precession

• fission

• barycenter

• rotation

wobbling around the precessional axis

• precession

• nutation

• fission

• rotation

the point when the earth is the farthest from the sun

• perihelion

• fission

• aphelion

• rotation

change in the direction of the acxis of the earth but without any change in tilt

• nutation

• precession

• fission

• rotation

an objects orbital motion around another object; takes Earth 365 days

• geocentric

• rotation

• revolution

• fission

Earth is the center of the solar system

• heliocentric

• rotation

• geocentric

• fission

the point where the Earth is closest to the sun

• perihelion

• aphelion

• fission

• rotation