Space

Question 1

What is a planet

Answer 1

A large object that orbits a star.

Question 2

What is a galaxy

Answer 2

A huge group of stars, dust, and gas held together by gravity.

Question 3

What is the solar system

Answer 3

The Sun and all the objects that orbit around it, including planets, moons, asteroids, and comets.

Question 4

What is the Big Bang theory

Answer 4

According to this theory, about 14 billion years ago, the entire universe was smaller than a pinhead. It was incredibly hot and dense. Then, in a massive explosion, it began to expand. This explosion created all the time, space, and matter we know today.

Question 5

Name 2 evidences of the Big Bang

Answer 5

1. In 1964, scientists discovered cosmic background radiation.
   This is the leftover heat from the Big Bang.
2. Edwin Hubble and Vesto Slipher found that galaxies are moving away from us.
   This suggests that the universe is expanding.