Relationships in Space Flashcards
Rotation
an object’s spinning on its axis
Revolution
the object’s orbital motion around another object
Tides
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon
Aphelion
the point in the orbit of a planet, comet, or other body most distant from the Sun.
Perihelion
the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun
Apogee
the point in the orbit of the moon or a satellite at which it is furthest from the earth.
Perigee
the point in the orbit of the moon or a satellite at which it is nearest to the earth
Umbra
the dark central part of a sunspot
Penumbra
the less dark outer part of a sunspot
What degree is the Earth tilted?
23.5
What type of path does the Earth revolve around the sun?
Ellipse/ Elliptical path
What is the equinox of the northern and southern hemispheres?
Northern hemisphere:
Top of the Earth- Autumnal equinox; Sept 22-23
West Earth- Winter Solstice; Dec. 21-22
Bottom of the Earth- Vernal/Spring Equinox; March 20-21
East Earth- Summer Solstice; June 20-22
When the Northern hemisphere is tilted toward the sun, what season is it?
Summer
When the Northern hemisphere is tilted away from the sun, what season is it?
Winter
How is the Earth positioned in Spring and Autumn?
Both the Southern and Northern hemispheres are pointed 90 degrees from the Sun, so neither hemispheres are pointed towards or away from the Sun.