Chapter 25: Our Solar System Flashcards
Older than rocks on the Earth
Lunar rocks
A rock found mainly on the moon’s planes
Basalt
What moon rock is composed mostly of the mineral feldspar?
Anorthosite
Abundant on the moon, rare on the Earth
Natural glass
Pyroxferroite, armalcolite, tranquillityite
3 new discovered moon minerals not found on Earth
Mineral which makes up the highlands of the Moon
Anorthosite
Means starlike
Asteroids
First asteroid discovered (1 Jan 1801 by Giuseppe Piazzi)
Ceres
Small, irregular shaped body composed of water, ice, rock, and frozen gases
Comet
Refers to the space within galaxies
Intragalactic space
Unstable stars; their action makes them appear to be winking
Nova
Exploding star
Supernova
Flashes electromagnetic emissions
Pulsar
The ultimate star, which cannot radiate anything
Black hole
Clouds of matter not yet stars
Nebulae
A spiral-shaped galaxy of which the Earth is a part
The Milky Way
How many days does it take the moon to orbit the earth?
2.27
Since the Moon is less massive than the earth, its gravitational pull is
only one-sixth that of earth’s.
Day and night on the moon can have a difference of __°F
520
From the earth we always see ________ of the moon.
The same side
Long, irregular depressions on the moon
Rilles
The Martian day is _____ to a day on earth
Similar
The reddish areas on Mars were thought to be
Deserts
Mariner 4 took the first ________ of another planet
Photos