Studied by 4 people
Spectroscope
________: a device that uses a prism or diffraction grating to separate light into its component wavelengths.
Astronomers
________ use constellations to locate and name stars.
Supernova
A(n) ________ is a gigantic explosion in which the temperature in the collapsing core reaches 10 billion K and atomic nuclei are split into neutrons and protons.
Cosmology
________: The study of how the universe began, how it evolves, and what it is made of.
Big Bang Theory
The ________: all matter and energy in the universe was compressed into a single point, which then began expanding outward.
Nuclear Fusion
________ occurs in the Suns core, producing the energy that reaches Earth.
Local Group
________: spread over about a region of about 10 million light- years in diameter and includes about 50 galaxies.
Cloud Fragment
The protostar formed in the center of a(n) ________ continues to collapse until nuclear fusion begins.
White Dwarf
________: The final stage in an average stars evolution.
Energy
________ is emitted as hot gas spirals into the black hole.
Auroras
________ take place when high- energy particles in CMEs and the solar wind are carried past Earths magnetic field.
Nuclear Bulge
The halo is a roughly spherical region that surrounds the ________ and disk and might have a diameter of 200, 000 light- years.
Telescope
Refracting ________: uses a convex lens, which is curved outward like the surface of a ball, to collect light.
Doppler Effect
The ________ occurs for a moving source of sound waves.
solar flares
Gases near a sunspot sometimes brighten suddenly, shoot- ing gas outward at high speed in what are called ________.
Photosphere
The ________ is the layer that emits light into space.
CME
When a(n) ________ is released in the direction of Earth, it appears as a halo around the Sun.
Globular Clusters
The halo is made of ________, which are groups of stars.
Equilibrium
________ is reached when the outward pressure exerted by the emitted radiation balances the inward pull of gravity.
Spiral galaxies
________ are disk- shaped and usually have arms that wind outward from the galaxys center.
Inward Pull of Gravity
When hydrogen in a stars core is used up, the outward radiation pressure becomes less than the ________.
Intense magnetic fields
________ associated with sunspots can cause huge arching columns of gas called prominences to erupt.
Optical telescopes
________ collect much more light from distant objects than can enter the unaided human eye.
Hubble
________ discovered that galaxies tend to be moving away from Earth.
Sun’s Photosphere
The ________ is at the top of the convection zone.
Supernova Explosion
A(n) ________ can emit so much energy that for a short time it can be brighter than an entire galaxy.
Sun’s Outer-Layer
The ________ is the convection zone.
Convection
________ in the convection zone causes magnetized gases to flow upward toward the photosphere.
Largest Object
Although the Sun is an average star, it is by far the ________ in the solar system.
Stars
________ are much closer together in the central region of spiral galaxies than in the disk.
Elements
________ with atomic numbers higher than iron are produced during a supernova explosion.
Spiral Arms
The ________ are regions where the concentration of dust and gas is higher, so that stars are being formed in the ________.
Dark Energy
________: repulsive force causing the expansion to speed up.
Star Formation
________ begins with a large cloud of gas, ice, and dust called a nebula.
Telescope
A refracting ________ uses a convex lens to collect light and form an image at the focal point.
Spiral Galaxies
________ also have a central bulge, or nucleus, where stars are closer together.
Constellations
star patterns
Refracting Telescope
uses a convex lens, which is curved outward like the surface of a ball, to collect light
Reflecting Telescope
uses a mirror to collect light
Radio Telescope
Collects and amplifies radio waves
Spectroscope
a device that uses a prism or diffraction grating to separate light into its component wavelengths
Giant
late stage of a stars life cycle
White Dwarf
The final stage in an average stars evolution
The Sun
A Main Sequence Star
Photosphere
The visible surface of the Sun that you see
Galaxy
a large group of stars, dust, and gas held together by gravity
Local Group
spread over about a region of about 10 million light-years in diameter and includes about 50 galaxies
Cosmology
The study of how the universe began, how it evolves, and what it is made of
The Big Bang Theory
all matter and energy in the universe was compressed into a single point, which then began expanding outward
Dark Matter
matter that cant be detected with telescopes
Dark Energy
repulsive force causing the expansion to speed up
typical neutron star
A(n) ________ is the size of a major city on Earth, but has a mass greater than the Suns.
Note 
Flashcard (32)