Telescopes
Define telescope.
a device that makes distant objects appear to be closer
The most common chemical element in a star is ___.
Hydrogen
A ___________ is a large cloud of gas and dust spread out into a large volume.
Nebula
Our solar system is located in the ___ galaxy.
Milky way
The main factor that affects the evolution of a star is its ___________.
Mass
______ is energy that can travel through space in the form of waves.
Electromagnetic radiation
A H-R diagram is a graph of stars’ temperature and _______.
Absolute brightness
The blue-white core of a star that is left behind and cools
White dwarf
A star system in which one star blocks the light from another is called a(n) _____.
Eclipsing binary
Our sun is a __________ sized star.
Medium
A refracting telescope uses _________ to gather and focus light.
Convex lenses
____ is a device that astronomers use to determine the chemical composition of stars.
Spectrograph
An explosion of a supergiant star after it runs out of fuel
Supernova
Large groupings of older stars.
Globular clusters
The _________ is a star’s brightness as seen from Earth.
Apparent brightness
A _______ telescope uses a curved mirror to collect and focus light.
List the colors of stars from hottest to coolest.
Blue, Yellow, Red
The remains of a high mass star.
Neutron stars
A galaxy that appears to have a bulge in the middle and arms that spiral outwards.
Spiral galaxy
A light-year is the _____________ that light travels in one year.
A ______ is a building that contains one or more telescopes.
The characteristics used to classify stars include what 5 things?
color, temperature, brightness, composition, size
An object with gravity so strong that nothing can escape.
Black hole
A galaxy that looks like a round, flattened ball.
A loose disorganization of stars
Open clusters