All of saturns moons are composed predominantly of what substance?
The apparent speed of the sun along the ecliptic is known as?
What substance is responsible for neptunes blue-green color?
Whos book, titled concerning the revolutions of celestial spheres, is considered to mark the birth of modern astronomy?
A solar eclipse can only occur at?
If the temperature of a star increases from 10,000k to 30,000k, by what factor will the rate of energy radiated per second increase?
These doughnut shaped zones of atomic particles consists of electrons and protons captured by the earths magnetic field from the solar winds and are called?
Rounded off to the nearest trillion, how many miles is in a light year?
Based on best altitude conditions, during what month in the northern hemisphere is it the best time to observe the full moon?
In a search for planet x, this celestial body was found after astronomers had searched for an orbital disturbance of the planet uranus?
This powerful telescope weighs about 11 tons, has a primary mirror 7.9 feet in diameter, and orbits about 380 miles above the earth?
An emission or bright line spectrum consists of?
The time between two successive meridian transits of the sun as observed from a stationary spot on the earth's surface is called?
How many moons does jupiter have?
Give the common name for the phenomenon which is the result of sunlight reflecting off the earth and faintly illuminating the darkened portion of the moon?