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?
What is the term for the amount of energy released from each square meter of an objects surface each second?
What do astronomers call the point in the sky that is directly overhead?
What is the constant called that is the average flux of the suns energy arriving at the earth?
The work of this harvard college observatory scientist made possible the first accurate determination of extragalactic distances by what is often called henriettas law?
Of the three types of meteorites, which is the most common, in terms of the number of samples, to fall to earth in recorded history?
What moon of neptune orbits in a retrograde direction?
