Light year - Revision history

Jmdonev: 1 revision imported

2018-06-25T14:30:35Z

1 revision imported

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Jmdonev at 19:39, 24 June 2018

2018-06-24T19:39:00Z

← Older revision		Revision as of 19:39, 24 June 2018
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	[[Category:Done 2018-05-18]]		[[Category:Done 2018-06-15]]
	[[Category: units]]		[[Category: units]]
	<onlyinclude>A '''light year''' (l.y.) is a [[units\|unit]] of distance, measuring how far [[radiant energy\|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second\|m/s]]. Therefore, if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><math>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</math></ref>		<onlyinclude>A '''light year''' (l.y.) is a [[units\|unit]] of distance, measuring how far [[radiant energy\|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second\|m/s]]. Therefore, if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><math>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</math></ref>
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	==Conversions==		==Conversions==
	<html><br /> <iframe src="~~http~~://energyeducation.ca/simulations/converter/converter.php?defaultMeasure=Length&defaultFrom=light year&defaultTo=kilometer" scrolling="no" width="750" height="200"> </iframe><br /> </html>		<html><br /> <iframe src="https://energyeducation.ca/simulations/converter/converter.php?defaultMeasure=Length&defaultFrom=light year&defaultTo=kilometer" scrolling="no" width="750" height="200"> </iframe><br /> </html>

			==For Further Reading==
			*[[Energy]]
			*[[End use energy]]
			*[[Primary energy]]
			*[[Energy conversion technology]]
			*Or explore a [[Special:Random\|random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

Jmdonev: 1 revision imported

2018-05-18T22:53:11Z

1 revision imported

← Older revision	Revision as of 22:53, 18 May 2018
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Jmdonev at 22:18, 11 May 2018

2018-05-11T22:18:00Z

← Older revision		Revision as of 22:18, 11 May 2018
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	[[Category:Done ~~2016~~-04-30]]		[[Category:Done 2018-05-18]]
	[[Category: units]]		[[Category: units]]
	<onlyinclude>A '''light year''' (l.y.) is a [[units\|unit]] of distance, ~~given by the distance~~ [[radiant energy\|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second\|m/s]]. Therefore if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><m>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</m></ref> This is an incredible distance, to put ~~into~~ perspective:		<onlyinclude>A '''light year''' (l.y.) is a [[units\|unit]] of distance, measuring how far [[radiant energy\|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second\|m/s]]. Therefore, if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><math>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</math></ref>

			This is an incredible distance! The following are some ways to help quantify the size of a light year and put it in perspective:

	~~To give some idea of the size of a light year:~~
	* It is approximately 63000x the distance from the Earth to the [[Sun]],		* It is approximately 63000x the distance from the Earth to the [[Sun]],
	* One light year is ~ 236 million times the circumference of the [[Earth]].		* One light year is ~ 236 million times the circumference of the [[Earth]].

Jmdonev: 1 revision imported: From the summer

2016-09-17T22:29:20Z

1 revision imported: From the summer

← Older revision	Revision as of 22:29, 17 September 2016
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Jmdonev at 18:19, 1 June 2016

2016-06-01T18:19:49Z

← Older revision		Revision as of 18:19, 1 June 2016
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	[[Category:Done ~~2015~~-09-05]]		[[Category:Done 2016-04-30]]
	[[Category: units]]		[[Category: units]]
	<onlyinclude>A '''light year''' (l.y.) is a [[units\|unit]] of distance, given by the distance [[radiant energy\|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second\|m/s]]. Therefore if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><m>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</m></ref> This is an incredible distance, to put into perspective:		<onlyinclude>A '''light year''' (l.y.) is a [[units\|unit]] of distance, given by the distance [[radiant energy\|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second\|m/s]]. Therefore if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><m>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</m></ref> This is an incredible distance, to put into perspective:

			To give some idea of the size of a light year:
	* It is approximately 63000x the distance from the Earth to the [[Sun]],		* It is approximately 63000x the distance from the Earth to the [[Sun]],
	* The nearest star to us, Proxima Centauri,<Ref>NASA, ''Hubble's New Shot of Proxima Centauri, our Nearest Neighbour'' [Online], Available: http://www.nasa.gov/content/goddard/hubbles-new-shot-of-proxima-centauri-our-nearest-neighbor/#.VVIxNvRDuT8</ref> is about 4.22 l.y. away		* One light year is ~ 236 million times the circumference of the [[Earth]].
			* Voyager 1, launched in 1977, is the object that humans have sent the farthest away, almost 18 billion kilometers!<ref>''NASA's Voyager Probes to Leave Solar System by 2016'' [online] http://www.space.com/11527-nasa-voyager-spacecraft-leave-solar-system.html accessed June 1st, 2016.</ref> A light year is still 530x that distance!

			To give some idea of astronomical sizes in terms of light years:
			* The nearest star to Earth, Proxima Centauri,<Ref>NASA, ''Hubble's New Shot of Proxima Centauri, our Nearest Neighbour'' [Online], Available: http://www.nasa.gov/content/goddard/hubbles-new-shot-of-proxima-centauri-our-nearest-neighbor/#.VVIxNvRDuT8</ref> is about 4.22 l.y. away
	* The center of our galaxy, the Milky Way, is about 26000 l.y. away<ref>NASA, ''The Milky Way'' [Online], Available: https://heasarc.gsfc.nasa.gov/docs/cosmic/milkyway_info.html</ref>		* The center of our galaxy, the Milky Way, is about 26000 l.y. away<ref>NASA, ''The Milky Way'' [Online], Available: https://heasarc.gsfc.nasa.gov/docs/cosmic/milkyway_info.html</ref>
	* The nearest galaxy, Andromeda, is approximately 2.5 million l.y. away<ref>Space Facts, ''Andromeda Facts'' [Online], Available: http://space-facts.com/andromeda/</ref>		* The nearest galaxy, Andromeda, is approximately 2.5 million l.y. away<ref>Space Facts, ''Andromeda Facts'' [Online], Available: http://space-facts.com/andromeda/</ref>

J.williams: 1 revision imported

2015-09-03T18:21:55Z

1 revision imported

← Older revision	Revision as of 18:21, 3 September 2015
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Jmdonev at 20:57, 27 August 2015

2015-08-27T20:57:13Z

← Older revision		Revision as of 20:57, 27 August 2015
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	[[Category:Done 2015-06-01]]		[[Category:Done 2015-09-05]]
	[[Category: units]]		[[Category: units]]
			<onlyinclude>A '''light year''' (l.y.) is a [[units\|unit]] of distance, given by the distance [[radiant energy\|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second\|m/s]]. Therefore if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><m>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</m></ref> This is an incredible distance, to put into perspective:
	<onlyinclude>A '''light year''' (l.y.) is a [[unit]] of distance, given by the distance [[radiant energy\|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second\|m/s]]. Therefore if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><m>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</m></ref> This is an incredible distance, to put into perspective:

	* It is approximately 63000x the distance from the Earth to the [[Sun]],		* It is approximately 63000x the distance from the Earth to the [[Sun]],

J.williams: 1 revision imported

2015-08-26T21:31:16Z

1 revision imported

← Older revision	Revision as of 21:31, 26 August 2015
(No difference)

J.williams at 16:54, 12 August 2015

2015-08-12T16:54:58Z

New page

[[Category:Done 2015-06-01]]
[[Category: units]]

<onlyinclude>A '''light year''' (l.y.) is a [[unit]] of distance, given by the distance [[radiant energy|light]] will travel in one year.</onlyinclude> The [[speed of light]] is extremely fast (in fact it is the fastest [[speed]] permitted by the laws of physics), equal to 299,792,458 [[meters per second|m/s]]. Therefore if light travels 299,792,458 meters in one second, the distance light will travel in a year is equal to 9.460730472 x 10<sup>15</sup> [[meter]]s.<ref><m>ly=299792458\frac{m}{s}\times \frac{3600s}{hr} \times \frac{24hr}{day} \times \frac{365.25days}{yr} \times 1yr = 9.460730472\times10^{15}m</m></ref> This is an incredible distance, to put into perspective:

* It is approximately 63000x the distance from the Earth to the [[Sun]],
* The nearest star to us, Proxima Centauri,<Ref>NASA, ''Hubble's New Shot of Proxima Centauri, our Nearest Neighbour'' [Online], Available: http://www.nasa.gov/content/goddard/hubbles-new-shot-of-proxima-centauri-our-nearest-neighbor/#.VVIxNvRDuT8</ref> is about 4.22 l.y. away
* The center of our galaxy, the Milky Way, is about 26000 l.y. away<ref>NASA, ''The Milky Way'' [Online], Available: https://heasarc.gsfc.nasa.gov/docs/cosmic/milkyway_info.html</ref>
* The nearest galaxy, Andromeda, is approximately 2.5 million l.y. away<ref>Space Facts, ''Andromeda Facts'' [Online], Available: http://space-facts.com/andromeda/</ref>
* The diameter of the observable universe is about 92 billion l.y.<ref>Space, ''How Big is the Universe?'' [Online], Available: http://www.space.com/24073-how-big-is-the-universe.html</ref>

==Conversions==
<html><br /> <iframe src="http://energyeducation.ca/simulations/converter/converter.php?defaultMeasure=Length&defaultFrom=light year&defaultTo=kilometer" scrolling="no" width="750" height="200"> </iframe><br /> </html>

==References==
{{reflist}}
[[Category:Uploaded]]