Difference between revisions of "Light Year"
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==Key Stage 3== | ==Key Stage 3== | ||
| + | ===Meaning=== | ||
| + | A [[Light Year]] is the distance [[light]] can travel in one [[Year|year]] in space. | ||
| + | |||
| + | ===About Light Years=== | ||
| + | : A [[Light Year]] is a [[distance]]. | ||
| + | : [[Scientist]]s use [[Light Year]]s as a [[unit]] for extremely large [[distance]]s. | ||
| + | : A [[Light Year]] is around 9,461,000,000,000,000 [[metre]]s. Since [[star]]s are much further away than this it doesn't make sense to write the [[distance]] in [[metre]]s so [[scientist]]s use the [[Light Year]]. | ||
| + | : The next nearest [[star]] to the [[Earth]], after [[The Sun]], is [[Alpha Centauri]] which is 4.23 [[Light Year]]s away. | ||
| + | : Our [[The Solar System|Solar System]] is in a [[galaxy]] called [[The Milky Way]] but the next [[galaxy]], [[Andromeda]] is 2,000,000 [[Light Year]]s away. | ||
| + | |||
| + | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
A [[Light Year]] is the distance [[light]] can travel in one [[Year|year]] in space. | A [[Light Year]] is the distance [[light]] can travel in one [[Year|year]] in space. | ||
Revision as of 15:35, 13 March 2019
Contents
Key Stage 3
Meaning
A Light Year is the distance light can travel in one year in space.
About Light Years
- A Light Year is a distance.
- Scientists use Light Years as a unit for extremely large distances.
- A Light Year is around 9,461,000,000,000,000 metres. Since stars are much further away than this it doesn't make sense to write the distance in metres so scientists use the Light Year.
- The next nearest star to the Earth, after The Sun, is Alpha Centauri which is 4.23 Light Years away.
- Our Solar System is in a galaxy called The Milky Way but the next galaxy, Andromeda is 2,000,000 Light Years away.
Key Stage 4
Meaning
A Light Year is the distance light can travel in one year in space.
About Light Years
- A Light Year is a distance.
- Scientists use Light Years as a unit for extremely large distances.
- A Light Year is around 9,461,000,000,000,000 metres. Since stars are much further away than this it doesn't make sense to write the distance in metres so scientists use the Light Year.
- The next nearest star to the Earth, after The Sun, is Alpha Centauri which is 4.23 Light Years away.
- Our Solar System is in a galaxy called The Milky Way but the next galaxy, Andromeda is 2,000,000 Light Years away.