Which of these objects orbit a star?
A satellite
A planet
A galaxy
Which of these objects radiate energy?
A meteor
A star
Which of the following best describes the universe?
The name we give to all the stars, planets and energy ever created
The name we give to a group of stars
The name we give to our solar system
What is an advantage of a geostationary orbit?
It means a satellite is in the same position above the Earth
It means the satellite doesn’t orbit and is easier to communicate with
It can be seen from Earth
Why is manned travel to nearby stars unlikely?
It is too dangerous
The distances are so vast
There is no gravity in space
The gravitational field strength on the moon is \(1.6\,Nkg^{-1}\). What would the weight of a \(24\,kg\) mass on the moon be?
\[9.8\,N\]
\[38\,N\]
\[240\,N\]
During re-entry, a great amount of heat energy is generated by the spaceship interacting with the air. One of the key properties of a heat shield tile is to be able to...?
Cut through the air smoothly
Withstand high wind speeds
Radiate much of the heat energy away
How could a spacecraft slow down when in orbit?
By releasing a parachute and it increases air drag
By firing a thruster in the opposite direction
By reducing its orbital height
What is the main reason that Ion drive engines are being developed for space travel?
They are safer
They are easy to operate
They generate acceleration but use the least amount of fuel
What is the Milky Way an example of?
A solar system
A red giant