Astronomy

Question 1

What is astronomy?

Answer 1

A branch of science that deals with space and the whole universe

Question 2

What is an astronomical unit?

Answer 2

A unit of measurement (au) to measure the distance from the sun

Question 3

What is a light year?

Answer 3

A unit used to measure the distance that light travels in one year (measures the distance from the sun)

Question 4

Why is it said that if we look into the sky, we’re looking to the past?

Answer 4

Because it could take a star hundreds of light years to reach us and when it arrives, it is long dead.

Question 5

What are galaxies?

Answer 5

A system of millions & billions of stars of which our solar system is part of.

Question 6

What galaxy do we live in?

Answer 6

We live in the Milky Way.

Question 7

What are to different shapes of galaxies?

Answer 7

Spiral, elliptical, lenticular, & irregular.

Question 8

What type of shape does our galaxy have?

Answer 8

Our galaxy (Milky Way) is a spiral

Question 9

What is our galaxy centered around?

Answer 9

The galactic bulge and suppermasive black hole

Question 10

Star phase life cycle:

Answer 10

1. Huge clouds of dust and gas collapse by gravitational force and create a protostar
2. The young stars continue to collapse
3. Stars expand as they grow older
4. When core runs out of hydrogen & helium the stars become less bright

Question 11

What will happen to the sun?

Answer 11

In about 5 billion years, the sun will expand & the core will run it if hydrogen and helium & it will become less bright & later become a red giant star

Question 12

Order of the planets

Answer 12

Sun, Mercury, Venus, earth, Mars, (asteroid belt) Jupiter, Saturn, Uranus, Neptune, (asteroid belt)

Question 13

Why is Uranus and it’s likes special?

Answer 13

It’s special bc the axis rotation is tilted sideways, so it’s north and south likes lie where most other planets have their Equators.

Question 14

Pluto is considered a dwarf planet and not an actually planet bc..

Answer 14

it is too small and there are other objects orbiting the wary that are the same size, so if Pluto was considered a planet, they would be too.

Question 15

Layers of the sun:

Answer 15

Inner core, radiative zone, convection zone, photosphere, chromosphere, corona (“haze”)

Question 16

Core:

Answer 16

High pressure temp & high reactions occur

Question 17

Radiative zone:

Answer 17

A very dense layer . Radiation including light is absorbed and re - admitted

Question 18

Convection zone:

Answer 18

There is constant circulation of plasma from hot to cooler regions

Question 19

Photosphere:

Answer 19

The yellow part of the sun that can be seen

Question 20

Chromosphere:

Answer 20

The red coloured layer that can only be seen during a solar eclipse

Question 21

Corona “haze”:

Answer 21

Hot outer layer about 1 million degrees

Question 22

Nuclear fusion:

Answer 22

The process that fuels or sun. Allows it to give off energy calls nuclear fusion. To atomic buckle dude together to create a larger nucleus and release energy in nuclear fusion

Question 23

What does the sun burn on?

Answer 23

Hydrogen and helium

Question 24

Rotation:

Answer 24

The planets individual spinning around an internal axis

Question 25

Revolution:

Answer 25

All the planets moving around the sun.

Question 26

Lunar eclipse:

Answer 26

An eclipse where the moon appears darker as it passes into earths shadow

Question 27

Solar eclipse:

Answer 27

A type of eclipse when the moon passes between the sun and the earth and the moon blocks the sun. (new moon only)

Question 28

Difference between low orbiting and high orbiting satellite

Answer 28

A low orbiting satellite orbits around the earth between 160 and 2000 km while a high orbiting satellite and the high orbiting one orbits above earth

Question 29

What are craters?

Answer 29

Craters are cavities usually found in the moon or earth

Question 30

How are craters caused?

Answer 30

By the impact of a meteoroid

Question 31

What is a meteor?

Answer 31

A tail of light that appears in the night sky when a meteorite enters the atmosphere

Question 32

What is a meterorite?

Answer 32

A piece of rock that enters the earths atmosphere from space..

Question 33

Why are there more meteors recorded than meteorites?

Answer 33

?

Question 34

Why does the moon have more craters than the earth?

Answer 34

Because earth has an atmosphere which causes asteroids to burn up before they reach the surface. Therefore the moon does not.

Question 35

What effects does space travel have on human bodies

Answer 35

Space sickness, weightlessness, muscular atrophy, body fluid imbalance

Question 36

The Big Bang:

Answer 36

The rapid expansion of matter that according to theories marked the origin of the universe

Question 37

Some evidence of the Big Bang

Answer 37

The universe is expanding, the abundance of different elements in the universe and the “cosmic microwave”