Flashcards
2022-01-18
What are the four characteristics of a planet (ORFC)??
- It is in __O__rbit around a star
- It has a mass large enough that gravity makes it __R__ound
- It has no __F__usion reactions
- It has __C__leared its orbit of most other objects
What is the difference between a planet and a dwarf planet??
A dwarf planet has not cleared its neighbourhood.
What is an asteroid??
An small, uneven and un-icy object that orbits the sun.
What are planetary satellites??
A body in orbit around a planet.
What are the two big categories of planetary satellites??
- Moons
- Satellites
What are comets??
Small, icy and irregular bodies made up of ice that orbit the sun in mainly eccentric elliptical orbits.
What sort of orbit does a comet have??
Highly eccentric and elliptical.
What are the two main differences between an asteroid and a comet??
- Comets are icy, whereas asteroids aren’t.
- Comets have highly eccentric and elliptical orbits, whereas asteroids have near-circular orbits.
What is a solar system??
One or more stars with planets orbiting.
What is the mnemonic for the order of the planets??
- My
- Very
- Eager
- Mother
- Just
- Served
- Us
- Noodles
What is the order of planets from the sun??
- Mercury
- Venus
- Earth
- Mars
- Jupiter
- Saturn
- Uranus
- Neptune
What is a nebula??
A giant, diffuse cloud of dust and gas.
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date: 2022-01-18 18:11
tags:
- '@?public'
- '@?school'
- '@?physics'
- '@?astrophysics'
title: Physics - Objects in the Universe