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?
113Based on best altitude conditions, during what month in the northern hemisphere is it the best time to observe the full moon?
109In a search for planet x, this celestial body was found after astronomers had searched for an orbital disturbance of the planet uranus?
138This powerful telescope weighs about 11 tons, has a primary mirror 7.9 feet in diameter, and orbits about 380 miles above the earth?
97The time between two successive meridian transits of the sun as observed from a stationary spot on the earth's surface is called?
118Give 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?
109What is the term for the amount of energy released from each square meter of an objects surface each second?
127The work of this harvard college observatory scientist made possible the first accurate determination of extragalactic distances by what is often called henriettas law?
80Of the three types of meteorites, which is the most common, in terms of the number of samples, to fall to earth in recorded history?
100
The hydrogen envelope that surrounds the comets nucleus derives its hydrogen most directly from?
If gravity only attracts mass and if light does not have mass why does it appear to bend when passing a planet?
What are black holes? Do they exist in reality?
Why these stars are called novae?
The work of this harvard college observatory scientist made possible the first accurate determination of extragalactic distances by what is often called henriettas law?
Name the part of the sun that we can see without any instruments?
Explain how is venus like earth?
How many moons do mars have?
How stars produce energy?
Do galaxies interact?
Tell me how many earths can fit into jupiter s great red spot?
How big is the universe?
Describe how are clouds formed?
How many types of galaxies are there?
A solar eclipse can only occur at?