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State the cosmological principle.
The ________ is the spherical outgassing as a comet nucleus is heated by the Sun.
Because the interior of the Earth is ________, the crust is much less dense than the
core.
The Murchison meteorite in Australia was found to contain ________.
A star both twice the diameter and twice the temperature of our Sun would be ________
times more luminous than our Sun; in fact, Vega fits this description well.
Elliptical galaxies contain only Population ________ stars and little gas and dust.
The Sun reinforces the Moon's tidal pull during ________ tides.
The ________ seismic waves can pass through both solid and liquid portions of the
Earth's interior, and be detected on the other side of the globe.
Cygnus X-1 was discovered because it is an ________ source in a ________ system.
Active galaxies emit most of their energy in ________ wavelengths than visible.
The discovery of dark energy increased support for the ________ universe.
While Kuiper Belt bodies are often larger than any asteroid, we think their density will
be lower due to presence of a lot of ________.
How are right ascension in the sky and longitude on Earth different?
Which terrestrial planets lack seasons? Why?
A dense, hot body will give off a(n) ________ spectrum.
