Earth And Space

Question 1

What is the Big Bang Theory?

Answer 1

The theory that the universe began from a singularity and has been expanding ever since.

Question 2

What are the main structures in the universe?

Answer 2

Galaxies, stars, solar systems, and nebulae.

Question 3

What is a light year?

Answer 3

The distance light travels in one year, approximately 9.46 trillion kilometers.

Question 4

What is a parsec?

Answer 4

is based on parallax which causes you to see different views of the same object

Question 5

How is a light year calculated?

Answer 5

By multiplying the speed of light (approximately 299,792 kilometers per second) by the number of seconds in a year.

Question 6

What is a galaxy?

Answer 6

A massive system of stars, star clusters, dust, and gas bound together by gravity.

Question 7

What is a solar system?

Answer 7

A system of planets and other celestial bodies that orbit a star

Question 8

What is a nebula

Answer 8

: A giant cloud of gas and dust in space, often the birthplace of stars.

Question 9

What is gravitational lensing?

Answer 9

The bending of light from distant objects due to the gravity of a massive foreground object, helping astronomers study galaxies.

Question 10

Life cycle of a star

Answer 10

• Nebula → Protostar → Main Sequence Star → (Red Giant / Supergiant) → Death (Planetary Nebula/White Dwarf or Supernova/Neutron Star/Black Hole)