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Jupiter and the Sun have almost the same composition and density; why isn't Jupiter
also a star?
When are Mercury and Venus easiest to observe from Earth? Why? How much of then
can we see at that time?
The dominant dark features on the near side of the Moon are the ________.
The two spacecraft constantly observing the Sun are ________ and ________.
In general, the more massive the star, the ________ its lifetime.
The atmosphere of Titan is chiefly ________.
From studies of the rotations of galaxies and dynamics of clusters, we now think that
about ________ of the mass of the universe is composed of dark matter.
What happens in the radiative zone?
What are the three main parts of our Galaxy?
What is the primary effect the carbon dioxide in Venus' atmosphere has on the planet?
The Saturnian moon of most interest to exobiologists is ________.
If the turn-off point of a cluster lies about type F, this cluster is very ________.
The mass of a neutron star cannot exceed about ________.
How were the rings of Uranus discovered?
Observationally contrast the discoveries of most comets and asteroids.
Most asteroid orbits lie between those of Mars and ________.
What is the closest thing to a binary planet we find in the solar system? Why?
