Seventh planet from sun is:
The biggest planet is
Different seasons on earth are due to:
The revolution of the Earth around the Sun on a tilted axis.
An astronomer is a scientist who studies _______.
An astronomer is a scientist who studies celestial bodies such as moons, planets, stars, nebulae, and galaxies.
What is an astronomer likely to use?
An astronomer needs a telescope to see distant objects like planets and galaxies which are far off in the universe.
What is the center of the solar system?
Who proved that sun is at the center of the solar system?
Why earth is called the blue planet?
Why do astronauts wear oxygen mask on moon?
There is no atmosphere or air on moon. Therefore, without oxygen mask it would be impossible to breathe on moon.
Why does the moon change its shape every night?