Astronomers look for the drop in the brightness of a star as an exoplanet, orbiting the star, passes between it and the Earth. What is the name of this method?
The Big Dipper
The transit method
The wobbly method
What is the method used to detect small, earth-like, exoplanets called?
The Doppler method
Which of the following is not a limitation of space travel?
Space radiation can cause cancer and is hard to shield against
Long periods of weightlessness is not good for the human body
Space is a vacuum
The Sun is 150 x 106 km away. If light travels at 3 x 108 m/s, how long does it take light from the Sun to reach the Earth?
0.5 s
25 s
500 s
A galaxy is found to be 25 million light years away. How far is that in metres? (1 light year = 9.46 x 1015 m)
2.4 x 1017 m
2.4 x 1020 m
2.4 x 1023 m
Which element, if found in the atmosphere of another planet, might indicate the presence of life forms.
Hydrogen
Helium
Oxygen
Space missions are difficult to justify. Which of the following statements is true?
The Moon is the furthest humans have gone
Mars is the furthest humans have gone
The Sun is the furthest humans have gone
What is the name given to a planet that orbits a star other than the Sun?
Protoplanet
Exoplanet
Protostar
What is a light year?
A measurement of distance
A measurement of time
A measurement of distance and time
A galaxy is observed to be 3.6x1020 m away from Earth. How far is that in light years? (1 light year = 9.46 x 1015 m)
2.6 x 10-5 light years
38,055 light years
55,492 light years