Earth in thee Solar system Flashcards
(5 cards)
1
Q
What are celestial bodies?
A
The Sun, Moon, and other objects seen during night in the sky
2
Q
What does the Big Bang Theory state?
A
The universe began as a single cosmic explosion about 15 billion years ago
3
Q
Define a star
A
A self luminous body which has its own heat and light
4
Q
What is a light year?
A
The distance travelled by light in one year at the speed of 3 lakh km per second
5
Q
What is a Solar System?
A
The family of the Sun, consisting of 8 planets, the Sun, and known meteors, satellites, asteroids, and comets
