New Deck Flashcards
whats angular velocity?
a time right of changing anguler positions of a rottating body normally writen as radians per seconds or radians per minute
whats orbit?
the curved path around plantes making stuff float around it
period
an amont of time during a humens life
revolve
to move in a circulare motion
rotation
spining on an axis
sidereal day
a space travel between 2 succsesive passages of a vernal equinox faster then a day
solar day
basicly a day 24 hours
year
a period of 365 or 366 days
astronomical unit
the distance between the eath and sun
light year
the distance light travels about 5.88mi. (9.46 trillon km.)
parsec
the distance equel to 1 second
nebula
basicly a cloud of gas and dust
constellation
any group of stars
planetesimal
one of the small celestial bodies that became one to make the planets of the solar systeam
protoplanetary
are moon sized planetary embryos
nuclear fusion
a nuclear reaction when some nuclei of a low atomic number fuse together to form a bigger nucleus
terrestrail planets
a planet with the same rocky ground as earth
gas giant planets
a planet almost intirly surounded of gas
comet
a celastial object made of ice,nucleus and dust and when near a sun a tail made of gas and dust
asteroid
a small rock body orbiting the sun
cosmologist
an astronimer that studies the evolution and space-time relations of the univers
whats accretion?
