Earth and Space Science

The first early astronomer to propose a sun-centered solar system was ____.

The true shape of planetary orbits was discovered by ____.

Large Doppler shifts indicate ____.

Which scientist discovered that Venus has phases, just like the moon?

What effect do solar flares have on Earth?

How old is the moon?

In Figure 24-1, what feature is labeled A?

Earth’s orbital speed is approximately ____.

The sun’s surface is made up mostly of ____.

One astronomical unit (AU) averages about ____.

What was the first space telescope built by NASA?

The product of nuclear fusion is ____.

All stars, regardless of size, eventually ____.

About 90 percent of stars on the H-R diagram are ____.

The planet with the greatest temperature extremes is ____.

The small particles that produce a streak of light upon entering Earth’s atmosphere are called

When a main-sequence star has exhausted the fuel in the core, it becomes a ___.

The apparent westward movement of a planet against the background of stars is called ____.

Jupiter’s Great Red Spot is believed to be a ____.

Which color has the most energetic photons?