Astronomy Flashcards
Is an Astronomical Unit the distance between the middle of the sun and the middle of the earth?
True
What is a Light-Year?
Distance that light travels in one year
Is a Parsec equal to 3.35 Light-Years?
False
A ______ is a fuzzy patch in the sky.
Nebula
Stars forming a pattern group that is recognizable ?
Constellation
Planetesimal is?
small bodies that can form other plants
Moon-sized planet embryos from discs that melt?
Protoplanetary
A big explosion?
Nuclear Fusion
What is are terrestrial planets?
Planets that have rocky surfaces like the earth or the 4 inner most planets in the solar system
Giant _________ are filled with mostly gas?
True
Define Comet?
An object that has gas, nucleus ice and and dust in it
A smaller planet orbiting the sun
Asteroid
What is Angular Velocity?
It is the change in a rate in the position that is in an angular way .
Is an Orbit a circular motion around the sun?
True
A length of time is?
Period
An orbit around something?
Revolve
What is an rotation?
the path of a planet that it tuns around a complete body
What is an solar day?
the time of successful transits of the meridian
Is a Year 256 days?
False
What is a Sidereal Day?
the time consecutive transits of the First Point of Aries
