The Universe - practice

Big Bang Theory

Scientific theory explaining how the universe began

Black Hole

Region of space having a gravitational field so intense that no matter or radiation can escape

Doppler effect

An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other

electromagnetic spectrum

Range of all types of electromagnetic radiation

Galaxy

Gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter

Geocentric model

The Solar System model with the Earth at the centre of the universe

Gravity

Natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light are brought toward one another

Heliocentric model

The Solar System model with the Sun at the centre of our solar system

Nebula

Giant cloud of dust and gas in space

Neutron Star

Collapsed core of a giant star

Red dwarf

Smallest and coolest kind of star

Redshift

Phenomenon where electromagnetic radiation (such as light) from an object undergoes an increase in wavelength

Solar system

Gravitationally bound system of the Sun and the objects that orbit it

Space

Expanse that exists beyond the Earth and between celestial bodies

Star

Astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

Telescope

Optical instrument that makes distant objects appear magnified by using an arrangement of lenses or curved mirrors and lenses

Universe

Name that we use to describe the collection of all the things that exist in space

White dwarf

What stars like the Sun become after they have exhausted their nuclear fuel