* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 4.3 – Earth`s Revolution
Survey
Document related concepts
Astrobiology wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Copernican heliocentrism wikipedia , lookup
Corvus (constellation) wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Extraterrestrial life wikipedia , lookup
Rare Earth hypothesis wikipedia , lookup
Extraterrestrial skies wikipedia , lookup
Astronomy on Mars wikipedia , lookup
Tropical year wikipedia , lookup
Comparative planetary science wikipedia , lookup
Astronomical unit wikipedia , lookup
Geocentric model wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Dialogue Concerning the Two Chief World Systems wikipedia , lookup
Transcript
4.3 – Earth’s Revolution • Revolution • Earth’s movement or orbit around the sun • Takes 365 days or 1 year to make one complete revolution • Elliptical • Earth’s orbit is elliptical (oval shaped) • Earth is closer to the sun at certain points of it’s orbit • Aphelion • Perihelion • Earth is farthest from sun in its orbit • Earth is closest to the sun in its orbit • Parallax • Evidence the Earth is revolving around the sun • Stars seem to change position throughout the course of the year – look closer or father away • ACTUALLY!! Earth is moving – not the star • Seasons • • • • Spring Summer Fall Winter • Summer Solstice • June 21 • First day of summer • Winter Solstice • Dec 21 • First day of Winter • Vernal Equinox • Autumnal Equinox • Mar 21 – 1st day of Spring • Sept 21 – first day of fall