The Electromagnetic Spectrum
The only type of electromagnetic radiation you can see.
What is visible light?
Three of the five characteristics used to classify stars.
What are color, temperature, size, composition, and brightness?
The leftover material from a massive star explosion whose gravity is so strong that nothing can escape it
What is a black hole?
A galaxy that does not have enough gas and dust to form new stars.
What is an elliptical galaxy?
The colors of the visible light spectrum in order
What are red, orange, yellow, green, blue, indigo, violet?
The form in which electromagnetic radiation travels through space.
What are waves?
The color of the hottest stars
What is blue?
A large cloud of gas and dust left over from a dead star and in which new stars can form
What is a nebula?
The Milky Way is a type of this galaxy.
What is a spiral galaxy?
The two types of telescopes used to collect light and other forms of electromagnetic radiation
What are optical and non-optical telescopes?
The electromagnetic radiation with the greatest amount of energy.
What are gamma rays?
The characteristic of stars that scientists use a spectrograph to determine
What is their composition or what elements they are made of?
A star at the earliest stages of its life
What is a protostar?
A smaller galaxy where many bright, young stars have formed.
What is an irregular galaxy?
A grouping of stars that can be either open or globular
What is a star cluster?
Electromagnetic radiation from the sun which can cause sunburn due to prolonged exposure.
What is ultraviolet light?
The brightness of a star as seen from Earth and the actual brightness of the star
What are apparent brightness and absolute brightness?
An explosion in which a star dies.
What is a supernova?
What is a quasar?
The area of the Hertzsprung-Russell diagram that our sun is found in
What is the main sequence?
Two characteristics of waves that change from one type of electromagnetic radiation to another
What are wavelength and frequency?
A diagram that shows the relationship between the brightness and surface temperature of stars.
What is the Hertzsprung-Russell diagram?
Three things a star can become when it runs out of fuel.
What are a white dwarf, a neutron star, a pulsar, or a black hole?
A system with two "suns" or stars in it
What is a binary star system?
The nearest star to our sun
What is Alpha Centauri?