Blog

The Great Red Spot has been visible on Jupiter for at least

When less than half the Moon is illuminated as seen from Earth, it is called a

Earth’s axis is tilted ______________ degrees from the normal to the ecliptic plane.

This planet has the largest known volcano in the solar system, Olympus Mons.

One ______________ is the distance to a star when the star exhibits a parallax of one second of arc.

The temperature of the Sun’s interior is estimated to be about how many kelvins?

Stars and galaxies emit all types of electromagnetic radiation, including _____________________, so spectroscopy is a major tool for studying the universe.

The apparent motion of an object when it is viewed from two different positions against a fixed background is called

Which of the following is typically the largest of the four?

Probably the best-known comet is ______________ Comet.