99% is the total mass of what?
it's the total mass of the sun
Thank you for your first edit user:Guy vandegrift--19:12, 1 February 2018 (UTC)
Russians were first to go around the moon. Russians could make very big rockets and to could go around the back of the moon and take photos. The craters in the moon are ancient. The moon is less dense than the earth. It takes 27.3 days for the moon to rotate.
How many days does it take for the moon to rotate? a) 20.5 days b) 36 days c) 37.8 days d) 27.3 days
We landed 12 astronauts on the moon between 1968 and 1972. 1969 first american astronaut stepped foot on the moon.
What year did the first american astronaut step food onto the moon? a) 1978 b) 1965 c) 1969 d) 1957
There are caters, seas, and highlands on the surface of the moon.
What do you NOT find on the surface of the moon? a) craters b) seas c) plateus d) highlands . . .
.. An example of a scarp is the horizontal crack on mercury. Antipodal to Caloris Basin is a weird terrain. A volatile is a substance that melts or evaporates at low temperature. The four smaller inner planers, mercury, venus, earth, and mars, also called the terrestrial planets, are primarily composed of metal and rock. If the universe is mostly hydrogen, why aren't terrestrial planets made mostly of hydrogen? These planets lie inside the frost line for hydrogen. Accretion-responsible for the growth of a planet. Mercury's atmosphere is mostly hydrogen. In what sequence did Mercury's weird terrain and Caloris basin form? It was formed almost immediately after the caloris basin. Caloris basin THEN the weird terrain. They happened within minutes or hour of each other.