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 room or building housing an astronomical telescope or other scientific equipment for the study of natural phenomena:
observatory
Which planet is closest to the sun?
Saturn
Mars
Jupiter
Mercury
Between these planets, which one is the biggest:
Neptune
Earth
Jupiter
Venus
A fixed luminous point in the night sky which is a large, remote incandescent body like the sun:
star
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??
A vehicle or device designed for travel or operation outside the earth's atmosphere:
spacecraft
The collection of eight planets and their moons in orbit around the sun, together with smaller bodies:
solar system
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.
An object we use to make things that are very far away appear to be closer to us:
telescope
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.
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
How many Earths could fit inside the sun?
One hundred thousand
One million
One billion
One thousand
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