Vocabulary
Two or more stars orbiting each other or a common point
what is a binary star?
The first stage of a star's life cycle
what is a nebula?
The unit that is on the x-axis of a HR diagram.
What is temperature?
Evidence for BBT that shows galaxies are moving away from us.
What is redshift?
The date of your exam.
What is Thursday week 10 (15/9)?
The mean distance from the centre of Earth to the centre of the Sun
what is an astronomical unit?
The final stage of a small/average sized star's life.
what is a white dwarf?
The main element that is fused inside a star
What is hydrogen?
Electromagnetic radiation (light) detected that is a remnant from an early stage of the universe.
what is the cosmic microwave background?
The attractive force that causes stars and galaxies to form.
What is gravity?
The distance light travels in a vacuum in one year.
what is a light year?
What is the main sequence?
The colour of the hottest stars on a HR diagram.
What is blue?
The two elements created in the big bang.
What is hydrogen and helium?
One of the theories of how the universe will end.
What is the big rip, big crunch or big freeze (heat death)?
The names of two types of galaxies.
What is spiral, elliptical and irregular?
The two possibilities that a star can become after a supernova.
The process that stars go through which releases heat and light.
What is nuclear fusion?
How long ago the big bang is thought to have occurred.
Approx 13.8 billion years ago.
The measure of how bright a star appears from Earth.
What is apparent magnitude?
what is dark energy?
the next stage after a large star expands to a supergiant.
What is a supernova?
The brightness and temperature of a white dwarf.
What is high temperature and low brightness?
The law which states that movement of galaxies takes place away from the Earth at speeds that are proportional to their distance.
What is Hubble's Law?
Each element in gas form will produce a series of bright lines unique to that element.
What is emission lines?