Megan MacGregor

The Butterfly Nebula

A star is a celestial body at a fixed point in space that emits energy in the form of waves Mass is the amount of matter in an object Nuclear fusion is a process in which atoms are pulled together Hydrogen is the lightest element in the Universe Helium is second lightest. Electromagnetic radiation is energy carried in the form of waves, including all visible light as well as UV and Infrared light

Low Mass Stars Dim, cool stars Red dwarf stars are the coolest and dimmest stars Live for 100 billion years At death, they change to white dwarves and quietly burn out

Intermediate Mass Stars Burn hydrogen gas much faster than low mass stars, resulting in a shorter lifespan Live for approximately ten billion years Expand to a red giant before death and burn out to a black dwarf Our sun, an intermediate mass star

High Mass Stars >12x larger than our sun Grow rapidly and to large size Live for 7 billion years Death results in huge explosion, known as a supernova

Supernova When a high mass star dies, it results in a huge explosion, larger than any other in the universe, known as a supernova. This supernova leaves huge amounts of gas and dust that can turn into neutron stars or black holes. A neutron is a small, dense star with two times the mass of our sun but a 12 km diameter.

Star Colours Red Stars, lowest heat, longest life Whiteish-blue stars, highest heat, shortest life Yellow stars, mid heat, our sun

The Doppler effect is a measureable effect caused by the movement of a celestial body. Waves of radiation move based on which direction the star is moving. If the star is moving closer to you, the waves will appear smaller in front of it’s projected path, whereas the waves behind will appear longer and more spread out.

Bibliography Science 9 textbook So