ਇੱਕ ਪ੍ਰਕਾਸ਼-ਸਾਲ:
- 9,460,730,472,580.8 ਕਿਲੋਮੀਟਰ ਹੁੰਦਾ ਹੈ
- ਲੱਗ-ਭੱਗ 5,878,630,000,000 ਮੀਲ ਹੁੰਦਾ ਹੈ
ਉੱਪਰ ਲਿਖੇ ਅੰਕੜੇ ਜੂਲੀਅਨ ਸਾਲ ਦੇ ਹਿਸਾਬ ਨਾਲ ਹਨ, ਜਿਸ ਵਿੱਚ 365.25 ਦਿਨ ਹੁੰਦੇ ਹਨ।[2] ਅਤੇ ਪਹਿਲਾਂ ਹੀ ਤਹਿ ਕੀਤੀ ਰੋਸ਼ਨੀ ਦੀ ਗਤੀ, ਜੋ 299,792,458 ਮੀਲ ਇੱਕ ਸੇਕੰਡ ਵਿੱਚ ਹੈ, ਇਨ੍ਹਾਂ ਦੀ ਵਰਤੋਂ 1984 ਤੋਂ ਹੋ ਰਹੀ ਹੈ।[3]
ਹੋਰ ਜਾਣਕਾਰੀ Factor (ly), Value ...
List of orders of magnitude for length
| Factor (ly) |
Value |
Item |
|---|
| 10−9 |
40.4×10-9 ly |
Reflected sunlight from the Moon's surface takes 1.2-1.3 seconds to travel the distance to the Earth's surface. (The surface of the moon is roughly 376300 kilometers from the surface of the Earth, on average. 376300 km ÷ 300000 km/s (roughly the speed of light) ≈ 1.25 seconds) |
| 10−6 |
15.8×10-6 ly |
One astronomical unit (the distance from the Sun to the Earth). It takes approximately 499 seconds (8.32 minutes) for light to travel this distance.[4] |
| 10−3 |
3.2×10-3 ly |
The most distant space probe, Voyager 1, was about 14 light-hours away from Earth 9 ਮਾਰਚ 2007 ਤੱਕ [update]. It took that space probe 30 years to cover that distance.[5] |
| 100 |
1.6×100 ly |
The Oort cloud is approximately two light-years in diameter. Its inner boundary is speculated to be at 50,000 AU, with its outer edge at 100,000 AU |
| 2.0×100 ly |
Maximum extent of the Sun's gravitational pull (hill sphere/roche sphere, 125,000 AU). Beyond this is true interstellar space |
| 4.22×100 ly |
The nearest known star (other than the Sun), Proxima Centauri, is about 4.22 light-years away.[6][7] |
| 103 |
26×103 ly |
The center of our galaxy, the Milky Way, is about 8 kiloparsecs away.[8][9] |
| 100×103 ly |
The Milky Way is about 100,000 light-years across. |
| 106 |
2.5×106 ly |
The Andromeda Galaxy is approximately 2.5 megalight-years away. |
| 3.14×106 ly |
The Triangulum Galaxy (M33), at 3.14 megalight-years away, is the most distant object visible to the naked eye. |
| 59×106 ly |
The nearest large galaxy cluster, the Virgo Cluster, is about 59 megalight-years away. |
| 150×106 - 250×106 ly |
The Great Attractor lies at a distance of somewhere between 150 and 250 megalight-years (the latter being the most recent estimate). |
| 109 |
1.2×109 ly |
The Sloan Great Wall (not to be confused with the Great Wall) has been measured to be approximately one gigalight-year distant. |
| 46.5×109 ly |
The comoving distance from the Earth to the edge of the visible universe is about 46.5 gigalight-years in any direction; this is the comoving radius of the observable universe. This is larger than the age of the universe dictated by the cosmic background radiation; see size of the universe: misconceptions for why this is possible. |
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