Science test Study - astronomy

Names of the planets in order

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

What is the Habitable zone

The Habitable zone  is an area of an orbital path around a star where liquid water could exist and cycle

Where is the habitable zone

The habitable zone is in the orbital path around a star. The distance from the star varies depending on how big the star is.

Inner planets    vs   Outer Planets (5 things)

Inner planets are terrestrial planets, while outer planets are ga giantss, Inner is smaller than outer planets, Inner is closer to the Sun than outer, Inner planets has fewer moons than outer planets, Inner planets  have shorter revolutions but slower axis spinning, while outer planets have longer revolutions but faster axis spinning

Orbit

The circular path of a celestial object around another object, such as a star or planet

Revolution

The amount of time it takes for an object to complete one cycle around a planet or star. Ex. 1 year on Earth

Celestial object

any natural object in space, big or small

Asteroid

small, rocky, irregular object made of rock and metal and orbits the Sun

Meteoroid

smaller than asteroids, made of rock and metal, travels through space

Planet

Has a nearly spherical shape, orbits the Sun, cleared its area of dust, asteroids, and meteors

Dwarf Planet

Has a nearly spherical shape, orbits the Sun, but has not cleared its area because it is not big enough yet

Moon

Rotates around a planet

Terrestrial/Rocky Planets

the 4 inner planets that have smaller masses and rocky surfaces

Gas Giants:

the 4 outer planets that are mostly made of gas and have much larger masses

Comet

A loose collection of ice, dust, and rocky particles that orbit in an elliptical shape.

What are the belts

Asteroid and Kuiper

Kuiper Belt

Made of ice and rocky material, after Pluto, much bigger than the Asteroid Belt, mostly comets

Asteroid Belt

Made of rock and metal, between Mars and Jupiter, smaller than the Kuiper Belt, mostly asteroids

Dwarf Planet(s) in the asteroid Belt

Ceres

Dwarf Planet(s) in the Kuiper Belt

Makemake, Pluto, Haumea, Eris

All the dwarf planets

Ceres, Makemake, Pluto, Haumea, Eris