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An electron has a ________ electric charge.
From a distance of 1 AU, the gravity of a three-solar-mass star is ________ the gravity
of a lower-limit stellar black hole.
The Moon's spin-orbit resonance shows it is ________ with the Earth.
The cheapest and probably most effective means of interstellar communication is
________.
Which four moons are believed to have large bodies of liquid water?
The only Jovian moon to orbit its planet retrograde and out of the equatorial plane is
________.
In the proton-proton cycle, two positrons are produced. What more familiar particles are
they similar to, and how do they differ?
What is meant by the idea life on Earth had an "interstellar origin"?
There is no obvious evidence for large-scale structure greater than about ________.
If we increased the pressure in a gas, how will its spectral lines be affected?
________ optics deform the shape of the mirror to compensate for the turbulence in the
atmosphere and yield a close to diffraction-limited image.
Compare and contrast the Galileo and Cassini missions.
If Ωo is exactly one, then the geometry of the universe is ________.
Over the course of the year, the Sun's noon altitude varies by ________ degrees.
The Tully-Fisher relation uses the ________ of the spiral to find its luminosity.
Relate our magnetic field to the aurorae.
A solar flare creates a radio disturbance on Earth a few minutes after going off, then
again several days later. Explain.
Herschel's map of the Galaxy was too small because ________ blocked much of the
starlight.
Why does the Earth's atmosphere contain much more nitrogen than hydrogen?
Apply Wein's law to explain the corona's main energy release.
