Red Shift
The part of visible light with the longest wavelength
What is the colour red?
It contains most of the solar system's mass
What is the sun?
They are a collection of billions of stars, gas and dust held together by gravity
What are Galaxies?
What is a nebula?
It is 13.8 billion years old
What is the age of the universe?
The effect causes the change in colour noticeable in receeding galaxies
What is redshift?
It is the farthest planet from the sun
What is neptune?
It is the diameter of the Milky Way
What is 100,000 light years?
The end stage of a low-mid mass star
What is a black dwarf?
Take the speed, v, at which a galaxy is receding. Divide it by the distance it is from the observer.
What is the Hubble constant?
It cannot travel through the atmosphere easily
What is highly red-shifted light / what is microwaves?
This is the collection of rocks, gas, and dust in between Mars and Jupiter
What is the asteroid belt?
It is 9.5 x1015 m
What is a light year?
Infrared radiation, Visible light, and ultraviolet light
Which parts of the EM spectrum does the sun emit most of?
The radiation found everywhere in the universe
What is Cosmic Microwave Background Radiation (CMB)?
The idea that space started in a single point and has been expanding outwards
What is the Big Bang Theory?
This decreases as distance from the sun increases
What is gravitational field strength?
They are theorized to be at the centre of many galaxies?
What are supermassive blackholes?
It's the remains of a red giant after it has run out of fuel
What is a planetary nebula?
Explain how the distance of a galaxy can be determined
What is using the brightness of a supernova?
Explain how the speed, v, of a receeding galaxy can be found
What is the change in wavelength of the galaxy's starlight due to redshift?
It increases as orbital radius increases
What is orbital Time Period?
Andromeda is a galaxy heading towards the milky way. It's colour will appear different. What is this phenomena called?
What is blueshift?
Proxima Centauri is roughly 4 light years away from the solar system. How far is that in metres?
What is 4.0 x1016 m? (accept answers from 3.7 x1016 m up to 4.0 x1016 m)
It is the value for the Hubble constant
What is 2.2 x10-18 /s ?