11 omfg fucc space i hate you >:(

Question 1

What is a powerful telescope in space rn & abilities

Answer 1

Hubble space telescope
Could see a coin from 725km away

Question 2

What is a galaxy

Answer 2

Set of bodies consisting of millions of stars with gas and dust particles

Question 3

What are the forms of galaxies

Answer 3

Spiral, elliptical, irregular

Question 4

Where is the solar system

Answer 4

Milk Way galaxy

Question 5

What are examples of spiral galaxy

Answer 5

Andromeda
Milky way

Question 6

What is characteristics of spiral

Answer 6

Bright & big
branch that spirals
Old stars (middle) & protostar (outside)

Question 7

What are example of elliptical galaxy

Answer 7

Ursa Major
Messier 87

Question 8

What is characteristic of elliptical galaxy

Answer 8

Oval, large, old star (lower temp)

Question 9

What is example of irregular galaxy

Answer 9

Small Magellanic Cloud
Large Magellanic Cloud

Question 10

What is characteristics of irregular galaxies

Answer 10

Small & Protostar

Question 11

What is the characteristics of Milky Way?

Answer 11

Medium large spiral galaxy (~ 10 ly)
Solar system - edge of one of the spiral arms (Orion arms)
Consists ~ 200 billion stars

Question 12

Life cycle of star is according to

Answer 12

Nebular Hypothesis

Question 13

What are stars formed by

Answer 13

Nebulae

Question 14

What are nebulae

Answer 14

Large clouds of dust particles & gases (hydrogen & helium)

Question 15

How is a globe formed

Answer 15

Gases & dust in nebula pulled by strong gravitational force

Question 16

How is core formed

Answer 16

Strong gravitational force -> globe of gas shrink & compress -> very dense

Question 17

When will nuclear reaction take place

Answer 17

Temperature & pressure in core becomes too high
Hydrogen gas -> helium (Nuclear Fusion)
Huge amount of heat energy & light released

Question 18

What happens after the nuclear reaction

Answer 18

Core will shine & star is formed (protostar)

Question 19

When star expands, it becomes either a ?

Answer 19

Average star (medium-sized) - Sun
Massive star (large & super large)

Question 20

What is life process of medium-sized, large & super-large

Answer 20

MS star -> red giant -> white dwarf
L & SL star -> red giant -> supergiant -> supernova -> Neutron star (L) / Black hole (SL)

Question 21

A lot of heat generated in star causes

Answer 21

Heat up outermost layer of star -> hydrogen start to burn -> star expand -> appears red = red giant

Question 22

How does supernova occur

Answer 22

Red giant is big enough -> contracts quickly -> big explosion
Extremely bright & can be seen in daylight

Question 23

Why is it called a black hole

Answer 23

Light & any matter that enters cannot escape

Question 24

What is the characteristics to classify star

Answer 24

Colour
Size
Temperature
Distance
Brightness

Question 25

State the colour of star from least to most hot

Answer 25

Red Orang Yellow Yellowish-white White Bluish-white Blue

Question 26

what are really small stars called

Answer 26

Dwarf stars

Question 27

Brightness of star depends on?

Answer 27

Size, distance & surface temp

Question 28

What are the brightest stars in the sky

Answer 28

1. Sirius - canis major 2. Rigel - orion

Question 29

Why is sun a star and not a planet

Answer 29

Emits its own light