This powerful telescope weighs about 11 tons, has a primary mirror 7.9 feet in diameter, and orbits about 380 miles above the earth?
Which of the constellations cannot be seen in the summer sky of the northern hemisphere?
How many moons does saturn have?
How many moons does uranus have?
An emission or bright line spectrum consists of?
Explain how far from earth, is the moon?
The apparent speed of the sun along the ecliptic is known as?
Did water come from comets?
How can space expand faster than the speed of light?
What is the effect of gravity at the center of a planet?
Tell me how many planets are now in the solar system?
Which of the is not another name for the pleiades?
How many stars are there in the whole universe?
Maria on the moon are?
Tell me how many stars are there in the whole universe?