The Universe

Question 1

How does the IAU define a planet?

Answer 1

1) revolves around the sun
2) nearly round (spheroid)
3) cleared the neighborhood around its orbit

Question 2

Earth’s twin planet

Answer 2

Venus

Question 3

Why is Mars red?

Answer 3

Iron oxide

Question 4

Has 67 moons

Answer 4

Jupiter

Question 5

Axis is tilted sideways

Answer 5

Uranus

Question 6

What kind of planet is Eris and Ceres?

Answer 6

dwarf planet

Question 7

Where do short period comets come from? What about long period?

Answer 7

Short: Kuiper-belt
Long: Oort Cloud

Question 8

Star nearest to the sun

Answer 8

Proxima Centauri

Question 9

A pattern of stars that may be part of a constellation

Answer 9

Asterism

Question 10

Star’s life cycle stages are?

Answer 10

Protostar - Main-sequence star - Post Main-sequence

Question 11

Sun like stars’ fate after life cycle

Answer 11

Red Giant - Planetary Nebula - White dwarf - Black dwarfs

Question 12

Massive stars’ fate after life cycle

Answer 12

Red Supergiant - Supernova (explosion) - Neutron star or Black Hole

Question 13

Groups of Galaxies progression

Answer 13

Galaxy group - Galaxy cluster - Supercluster

Question 14

Where are we in the observable universe?

Answer 14

Earth - Solar system - Milky Way galaxy - Local Galactic group - Virgo supercluster - observable Universe

Question 15

When did the Big Bang occur?

Answer 15

14 million years ago

Question 16

What are the evidences of the Big Bang?

Answer 16

Red-shift (moving away) and cosmic background radiation

Question 17

What were the elements created in the Big Bang nucleosynthesis?

Answer 17

H, He, Li, Be, and B

Question 18

What were the elements created in the Stellar nucleosynthesis?

Answer 18

heavier elements from C to Fe

Question 19

What were the elements created in the Explosive nucleosynthesis?

Answer 19

elements heavier than Fe