astronomial unit Flashcards
What is Astronomical unit ?
An average distance between the earth to the sun.
What is light year ?
Light year is the distance that is travel in year (over five trillion miles).
What type of unit that parsec meausre ?
Unit of astronomical distance equal to the distance from the earth .
What does a Nebula do ?
Spread a cloud interstellar gas and dust.
What does a constellatin do ?
It form a figure or desing in the sky with a group of stars.
________ is a small body of accreted gas and dust .
Planetesimal
Whats does a protroplanetart do ?
It rotate a disk of dust and gas.
What does nuclear fusion form ?
It form a heavier nucleas with the realease of energy.
What are the four Terrestrial planets in the solar system ?
The four Terrestial planets are Mercury, Venus, Earth, and Mars.
How mnay gas planets do we have in our solar sysyems ?
We have four gas planets: Jupiter, Saturn, Uranus, and Neptune.
What is comet ?
A celestial object consisting of a nucleus of ice and dust .
What is the small rocky body orbiting the sun ?
The small rocky body orbiting the sun is Asteriod.
What is the science of the orgin and development of the universe ?
The science of the orgin and development of the universe is a Cosmologist.
What is angular veocity ?
Angular veocity is the rate of change of angular position of a rotating body .
What does a orbit do ?
Curve a path of celestrial object or spacecrafft around a star, planet, or moon.
What is a length or portion of time ?
A length or portion of time is a period.
What turn around or rotate, as on axis ?
Its called a revolve that turn around or rotate, as on axis.
What is the action of going around an axis or center ?
Rotation is the action of going around an axis or center.
What is sidereal ?
Side real is of or with respect to the stars.
What is the time between successive meridian transits of the sun at a particular place?
A solar day is the time between successive meridian transits of the sun at a particular place.
What is the period of 365 days ?
A year is the period of 365 days.
