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2 dni temu · A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it!
1 dzień temu · Ever wondered what a light year really means? In this video, we break down the concept of light years and explain how far they truly are in terms you can und...
3 dni temu · The globular cluster Messier 69 is highly unusual for being both incredibly old, with indications that it formed at just 5% the Universe’s present age (around 13 billion years ago), but also ...
4 dni temu · Using the radius of Earth’s orbit as the baseline, the distance of the star can be found from the parallactic angle, p. If p = 1″ (one second of arc), the distance of the star is 206,265 times Earth’s distance from the Sun—namely, 3.26 light-years.
1 dzień temu · Proxima Centauri is a small, low-mass star located 4.2465 light-years (1.3020 pc) away from the Sun in the southern constellation of Centaurus. Its Latin name means the 'nearest [star] of Centaurus'. It was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun.
1 dzień temu · Surviving accounts from the period describe it as appearing to be four times the size of Venus, and shining with a light equal to a quarter of that of the Moon. Halley came within 0.10 au of Earth at that time.
3 dni temu · As of 2013, the probe was moving with a relative velocity to the Sun of about 61,197 kilometres per hour (38,026 mph). [ 52] With the velocity the probe is currently maintaining, Voyager 1 is traveling about 523 million km (325 million mi) per year, [ 53] or about one light-year per 18,000 years.
