Astronomy vocab- Earth sci

Front

Doppler effect related to planets moving away, indicating universe expansion.

Back

Redshift

Front

Time when the sun crosses the celestial equator, resulting in equal day and night lengths, occurring twice a year.

Back

equinox

Front

Times of year when the sun is highest/lowest at noon, marking longest/shortest days.

Back

solstice

Front

Branch of science dealing with celestial objects and the universe.

Back

astronomy

Front

Instance of revolving in a circuit or lap

Back

revolution

Front

Action of rotating around an axis or center

Back

rotation

Front

Atoms of hydrogen gas combine to form helium.

Back

Nuclear fusion

Front

Solar system formation from an interstellar cloud of dust and gas (nebula)

Back

Nebular theory

Front

Earth's wobble during precession changes the axis angle.

Back

Nutation

Front

Causes stars to change direction in the sky (every 26,000 years)

Back

Precession