Download Solar_System_Vocab_1

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Orrery wikipedia, lookup

Definition of planet wikipedia, lookup

History of Solar System formation and evolution hypotheses wikipedia, lookup

Planets beyond Neptune wikipedia, lookup

Dwarf planet wikipedia, lookup

Aquarius (constellation) wikipedia, lookup

Astronomical unit wikipedia, lookup

Timeline of astronomy wikipedia, lookup

Extraterrestrial life wikipedia, lookup

Comparative planetary science wikipedia, lookup

Astrobiology wikipedia, lookup

Dialogue Concerning the Two Chief World Systems wikipedia, lookup

Formation and evolution of the Solar System wikipedia, lookup

Planetary habitability wikipedia, lookup

IAU definition of planet wikipedia, lookup

Rare Earth hypothesis wikipedia, lookup

Astronomical naming conventions wikipedia, lookup

Geocentric model wikipedia, lookup

Solar System wikipedia, lookup

Planetary system wikipedia, lookup

Exoplanetology wikipedia, lookup

Planet wikipedia, lookup

Nebular hypothesis wikipedia, lookup

CoRoT wikipedia, lookup

History of astronomy wikipedia, lookup

Circumstellar habitable zone wikipedia, lookup

Planet Nine wikipedia, lookup

Satellite system (astronomy) wikipedia, lookup

History of Mars observation wikipedia, lookup

Discovery of Neptune wikipedia, lookup

Transcript
Vocabulary: Solar System
Vocabulary

Atmosphere – the layers of gases surrounding a planet, moon, or sun.
o The visible part of the atmosphere of gas giants is considered part of the planet
itself.

Ellipse – a flattened circle.
o
The orbits of all planets are in the shape of ellipses. These orbits are only slightly
elliptical, so they appear to be circles to the naked eye.
o
Many comets have orbits that are very elongated.

Gas giant – a large planet composed mainly of gas.

Inner planet – any of the four planets closest to the Sun (Mercury, Venus, Earth, and
Mars).
o The distinction between “inner” and “outer” is due to the very large gap between
Mars’ orbit and Jupiter’s orbit.
o There is a large asteroid belt between the inner planets and the outer planets.

Orbit – the path of one body around another body, such as the path of Earth around the
Sun.

Outer planet – any of the four planets farthest from the Sun (Jupiter, Saturn, Uranus, and
Neptune).

Planet – an object orbiting a star that is round, not itself a star, and large enough to have
cleared the area around it of small objects.

o
There are eight known planets in our solar system: Mercury, Venus, Earth, Mars,
Jupiter, Saturn, Uranus, and Neptune.
o
There are three “dwarf planets” in our solar system: Ceres, Pluto, and Eris.
o
This definition was agreed on by the International Astronomical Union in 2006. It
remains controversial.
Rocky planet – a planet having a rocky surface like Earth’s.
o


Also called “terrestrial planet.”
Solar system – a star and the objects that orbit it.
o
Our solar system includes the Sun (known to scientists as “Sol”), the eight
planets, and their moons.
o
Our solar system also includes asteroids, comets, dwarf planets, and planetoids.
Year – the period of time that it takes a planet to complete one revolution around its star.