Universe Flashcards
what is a Galaxy
a system of millions or billions of stars and planets with gases and dust particles held together by a gravitational force
what is a star
Any of the various types of hot , gaseous self luminous celestial bodies whose energy is derived from the nuclear fusion reaction
what is a constellation
A groups of stars forming a recognizable pattern E.G . Libra
whatis a planet
a celestial object moving in a orbit around a star
satellite
a celestial body moving around the planets
which celestial object is known as dirty ice ball
A comet
comet
A celestial object that orbits the sun . when a comet is away from the sun. it consists of nucleus a solid core of Ice , frozen gas and dust . it develops a bright tail of gas and dust when it passes near the sun
meteoroids
a small rock or particle of the debris in orbit around the sun
which astral object is known as the minor planet
asteriod
what is an asteroid
a larde rocky body in orbit the sun. The asteroid belt is formed between the orbits of the Jupiter
which astral object is known as shooting star
Meteor
what is a meteorite
a meteoroids that survives falling through the atmosphere and collides with the earth surface forms a crater e,g, Reason of extinction of dinosaurs
what is a solar system
The sun, asteroid, meteoroid, planets, comets form the solar system
what are the two planets which does not have a moon
mercury and venus
what is the name of the brightest and hottest planet
Venus
Earth was formed around `
4.6 billion years ago
which galaxy is the closest galaxy to Milky way galaxy
Andromeda
Haleys comet is visible in every
76 years it was last visible in 1986
what are the two planets which rotates from west to east
Venus and Uranus
which planet has the highly tilted rotational axis
Uranus
pole star appears stationary because it is
positioned close to the axis of the earth
what is the name of the constellation which has seven stars and also known as the great dipper and the great bear
Ursa major which has sever stars in its constellatiion
what is the nameof the constellation which is known a hunter constellatin
Orion
what is the name ofthe constellationwhich is closer to the star sirius
Orion
what is Pulsars
Pulsating radio stars
Pulsars
Pulsars are types of neutron stars . the dead remains of massive stars , they are highly magnetised and emit a beam of eloctromagnetic radion
what is Quasars
quasi stellat radio sources are extremely luminou s sources of electromagnetic energy that appear to be similiar to stars
what is red giant
Red giant is lumionus giant dying star of low or intermediary madd ( roughly 0.3 - 8 solar masses 0 in the last stages of solar evolution
what are white dwarfs
white dwarfs are burnt out cores of collapsed stars that like dying embers slowly cools and fades away
Supernova
the explosion of a star runs out of nuclear fuel some of its mass flows into the core , finally the core is so heavy that it cant withstatnd its own gravitational force , the core collapses results in the giant supernova explosin.
