Explain how far away from earth, is space?

103

What are the only two planets to rotate from east to west?

189

Which is the brighest star?

108

How were the earth, sun and moon formed?

136

The persied meteor showers are viewed in the state of maine during what month?

102

What is the expected life of solar system?

116

How many moons does jupiter have?

109

How many stars are there, which are normally visible?

105

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?

114

When a superior planet is at quadrature in reference to the earth, what is its elongation in degrees?

173

Astronomers usually detect the electromagnetic emissions of a single neutron star in what single form?

112

Explain how have some stars had time to die since the universe began?

122

Tell me how many moons does saturn have?

107

How was the moon formed?

115

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?

100