GALAXIES
star systems composed of billions of stars
GALAXY
huge, massive spheres of incandescent gas much like our sun
STARS
a large cloud of gas or dust in space
NEBULA
distance that light travels in one year which is equal to 9.46 trillion kilometers
LIGHT YEAR
A change in an object’s direction due to a change in the observer’s position
PARALLAX
lack definite shape or symmetry, large and small magellanic clouds belong to this type
IIREGULAR
star closest to our sun, has a parallax of about 0.76 second
PROXIMA CENTAURI
the earliest stage of a star's life
PROTOSTAR
a measure of how bright a star appears to be on earth
APPARENT MAGNITUDE
refers to the brightness of stars as they are viewed from Earth
MAGNITUDE
flat, circular or ellipsoidal shapes resembling the central disk of spiral galaxies
ELLIPTICAL
the explosion of a star in which the star may reach a maximum intrinsic luminosity one billion times that of the sun
SUPERNOVA
exerts such a strong gravitational pull that no light escapes
BLACKHOLE
a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure
CONSTELLATIONS
the actual brightness of a star
LUMINOSITY
look like thin lenses or whirlpools
SPIRAL
the fusion or joining of hydrogen atoms forming helium
NUCLEAR FUSION or THERMONUCLEAR REACTION
NEUTRON STAR
BONUS😊
4 POINTS
super giant, giant, and dwarf
SIZE
slightly farther at 180,000 light years away, it is situated at the south celestial pole near the constellation Tucana
SMALL MAGELLANIC CLOUDS
a Greek astronomer, introduced a scheme of classifying stars according to their apparent magnitude
HIPPARCHUS
about 90 percent of the stars in the universe, including the sun, these stars can range from about a tenth of the mass of the sun to up to 200 times as massive.
MAIN SEQUENCE STARA
BONUS 😊
5 points
a measure of how bright a star would be if all stars were at the same distance
ABSOLUTE MAGNITUDE