Unit 1 Practice Questions Flashcards
Important parts of the night sky
Celestial poles
Celestial Equator
Horizon
Zenith
Ecliptic
Celestial Poles
the point where Earth’s axis of rotation intersects the celestial sphere
Celestial Equator
a projection of earth’s equator onto the celestial sphere
Horizon
the boundary between the visible sky and earth
Zenith
the point directly above an observer on the celestial sphere
Ecliptic
the path the sun takes throught sky over the year
To leave the gravitational pull of the Earth, and explore other planets, satellites must have at least:
escape velocity
11.2 km/s
40 000 km/h
Max difference in angular size and brightness of full moon (at apogee and perigee)
14% larger
30% brighter.
The altitude at which most aurorae occur is
100 km.
Edmund Halley
cometary orbits and the prediction of when a specific comet would return to the inner solar system.
The crew for the recent flight of Starliner (CFT-1)
was only 2, Suni Williams and Barry Wilmore.
