Telescopes
This type of electromagnetic radiation is what we can see
What is visible light?
These are imaginary patterns of stars
What are constellations?
Stars start out as this large cloud of gas and dust
What is a nebula?
Most stars are members of groups of two or more stars, which are called these
What are star systems?
Scientists think that this was formed about 13.7 billion years ago
What is the universe?
This type of electromagnetic radiation is what doctors use to see our bones
What are X-rays?
What size star is the Sun?
What is medium?
A star is born when this process begins to take place
What is nuclear fusion?
Earth is located in this galaxy
What is the Milky Way?
This is a theory that proposes how the universe was formed
What is the big bang?
This type of telescope uses convex lenses
What is a refracting telescope?
These two factors determine the brightness of a star
What are size and temperature?
How long a star lives depends on this
What is mass?
Scientists often use this to make very large numbers easier to write
What is scientific notation?
What is dark matter?
This is what a reflecting telescope uses to collect and focus light
What is a mirror?
This is a star's brightness as seen from earth
What is apparent brightness?
This is the sudden explosion of a star
What is a supernova?
The Milky Way Galaxy is this kind of galaxy
What is a spiral?
The universe is infinite and _____
What is expanding?
This includes the entire range of radio waves, infrared radiation, visible light, ultraviolet radiation, and gamma rays
What is the electromagnetic spectrum?
Astronomers often use this to measure distances to nearby stars. It is an apparent change in an object's position
What is a parallax?
When high mass stars die, they become one of these two massive objects
What is a black hole or a neutron star?
These are distant, enormously bright objects that look like stars. they have big holes in their center too!
What are quasars?
This law states that a galaxy that is farther away is moving faster
What is Hubble's Law?