Explain how far away from earth, is space?
What are the only two planets to rotate from east to west?
Which is the brighest star?
How were the earth, sun and moon formed?
The persied meteor showers are viewed in the state of maine during what month?
What is the expected life of solar system?
How many moons does jupiter have?
How many stars are there, which are normally visible?
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?
When a superior planet is at quadrature in reference to the earth, what is its elongation in degrees?
Astronomers usually detect the electromagnetic emissions of a single neutron star in what single form?
Explain how have some stars had time to die since the universe began?
Tell me how many moons does saturn have?
How was the moon formed?
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?