vocab Flashcards
(27 cards)
Absolute Magnitude
A brightness scale is used to measure how bright a star would be at a standard distance
apparent magnitude
The brightness of a star at earths view
galaxy
Large collection of stars, dust, and planets bound together by gravity
H-R diagram
A graph that shows the relation between heat and size of a star
Light Year
the distance light travels in about a year.
Luminosity
The actual brightness of a star
Main Sequence
where stars spend most of their lives
Nebula
A large cloud of dust where stars are born
Neutron star
The core of a supernova that has collapsed, atoms are smashed together to build neutrons
Planet
A large spherical body that orbits a star
Pulsar
beam of light and matter
Revolution
One orbit trip
Rotation
The spin of a body on its axis
Solar system
collection of large and small planets orbiting a star
wavelength
the distance between two adjacent crests
Supernova
A large-scale explosion when a large star removes their outer layer keeping the core
Universe
Space and all the matter and energy in it
White dwarf
A hot dence mini sun
Spiral galaxy
a galaxy that has arms protruding out, in a spiral shape
elliptical galaxy
a spherical or elongated galaxy with a bright center
Irregular Galaxy
a Galaxy with an irregular shape
Electromagnetic Spectrum
all the different wavelengths of electromagnetic waves and radiation
Big Bang Theory
Theory where all matter and energy was created when the universe exploded and created it
Cosmic Microwave Background
the Electromagnetic radiation left over the formation of the universe
