astronamy Flashcards
What is the definition of Nebula ?
a outer space cloud of gas & dust
What is the definition of light year?
a astronomical distance that travels the same that light travels in one year .
What is the definition of comet?
ice & dust of a nucleus celestial object
What is the definiton of parsec ?
astronamy used in a distance
What is the definition of asteriod ?
rocky small body , in which the sun orbits
What is the definition of constellation?
A grouping of stars in the night sky into a recofnizable pattern.
What is the definiton of planetesimal?
One of the small bodies , that formed from the solar nebula and eventually grew into proto planets.
What is the definition of protoplanetary?
A clump of material , formed in the early stages of solar system formation.
What is the defintion of nuclear fusion?
A nuclear process that releases enegry when lightweight nuclei combine to form heavier nuclei .
What is the defintion of Astronomical unit ?
Average distance between sun & earth.
Cosmologist is ?
When astornomers study the evaluation of space time relations.
Gas giant planets are?
a planet recognized as an entire ball of gas.
Terrestrail planets are ?
A rocky surface somewhat like earths
Angular velocity is ?
The rate of change in a position of a rotating body
Orbit means ?
A curved object around the moon , planets , etc.
period means ?
period means belonging to a past historical time.
Revolve means ?
Moving in a circular motion.
Rotation means
the act ot rotating around the center of an axis.
Sidereal day means ?
the time between to transits.
Solar day means ?
the time between the sun
Year means ?
the period of 365 days
