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The natural satellite of the earth, visible usually at night by reflected light from the sun:
moon
A small rocky body orbiting the sun:
an asteroid
The collection of eight planets and their moons in orbit around the sun, together with smaller bodies:
solar system
A fixed luminous point in the night sky which is a large, remote incandescent body like the sun:
star
A room or building housing an astronomical telescope or other scientific equipment for the study of natural phenomena:
observatory
An object we use to make things that are very far away appear to be closer to us:
telescope
A collection of stars and planets that are held together by gravity:
galaxy
All of space and everything in it including stars, planets, galaxies, etc:
universe
A vehicle or device designed for travel or operation outside the earth's atmosphere:
spacecraft
Which planet is closest to the sun?
 
Mercury
 
Mars
 
Saturn
 
Jupiter
Between these planets, which one is the biggest:
 
Jupiter
 
Venus
 
Neptune
 
Earth
How many Earths could fit inside the sun?
 
One million
 
One thousand
 
One billion
 
One hundred thousand
TRUE OR FALSE? Space is completely silent.
TRUE, there is no air or atmosphere in space. Since it is a vacuum, sound waves will have no medium to travel to. That means, no one will hear you in space.
TRUE OR FALSE: When you look at a star, what you see is actually what it looked like in that past.
TRUE: Light takes time to reach Earth. For instance, sunlight takes about 8.5 minutes to reach the Earth’s surface. So, you may be seeing the version of years
TRUE OR FALSE? The moon is slowly moving closer to our planet, which has made the days on Earth to become shorter and shorter. In the past, the days used to last 60 hours.
False! The moon is moving away from us, 1.4 billion years ago our days lasted around 18 hours, can you imagine??
TRUE OR FALSE? Because of the lack of gravity, astronauts get shorter in outer space.
FALSE! Astronauts can grow about 5 centimeters during their stay in space. The reason for this is the lack of gravity which expands the disks of their spines.


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