It's actually 4.22 light years. I haven't the foggiest idea what that is in kilometres, since the kilometre is a meaningless unit to measure stellar distances. 150 million kilometers. Earth orbits the sun 100,000 times closer than the Oort Cloud, at an average of 92,955,807 miles (149,597,870 km). If the universe is expanding, then what's beyond the edge of the universe? You can sign in to vote the answer. The image on the preceding page was created to demonstrate that Alpha Centauri is not a star, but really a star system. A light-year is the distance that light travels in one year (365 days). The nearest star to our sun is Proxima Centauri, at a distance of 4.3 light-years from the sun. How do spaceships and space labs not run out of fuel (energy) like going to mars and landing and then sending pictures? Moreover, the equilibrium temperature of Proxima b is estimated to be within the range where water could exist as liquid on its surface; thus, placing it within the habitable zone of Proxima Centauri. This is slightly greater than the distance between Uranus and t… Join Yahoo Answers and get 100 points today. So it would be 4.3 (it's actually 4.22 light years by the way) times the length of a light year in km. A light-year is the distance that light travels in one year (365 days). Proxima Centauri b (also called Proxima b or Alpha Centauri Cb) is an exoplanet orbiting in the habitable zone of the red dwarf star Proxima Centauri, which is the closest star to the Sun and part of a triple star system. The two bright stars, called Alpha Centauri A and B form a close binary system; they are separated by only 23 times the Earth - Sun distance. Its estimated mass is at least 1.3 times that of the Earth. Alpha centauri alpha centauri travel to the est star astronomers announce proxima centauri s Scientific Notation The Distance To Proxima CentauriImagine The UniverseProxima Centauri Alchetron The Social EncyclopediaHow Long Would It Take To Travel The Est StarProxima Centauri ConstellationProxima B By The Numbers Possibly Earth Like World At NextSay O To The Earth S Est… Found orbiting proxima centauri earth may be even closer than we imagined meet the stars next door astronomy a potentially habitable world in our new horizons parallax seeks Scientific Notation The Distance To Proxima CentauriImagine The UniverseProxima Centauri ConstellationThe Next Earth May Be Even Closer Than We ImaginedProxima B By The Numbers Possibly Earth Like… How far away, in ( km), is Proxima Centauri from the sun? Proxima Centauri is extremely distant from its two companions, orbiting them at a distance of around 1.2 trillion miles (1.9 trillion km). Of the three stars in the system, the dimmest - called Proxima Centauri - is actually the nearest star to the Earth. Is it gravity holding it together? Get your answers by asking now. What is it outside of the universe? Man dangles from Trump Tower, asks to meet president. If you know the distance (in light years) and you know the length of a light year (in km - if you don't know, you can look it up) then you just multiply those 2 numbers. Did an intentional penalty boost Titans comeback? Proxima centauri and alpha breaking news closest ever earth like earth like pla orbiting proxima est exopla neighbour Scientific Notation The Distance To Proxima CentauriProxima B By The Numbers Possibly Earth Like World At NextProxima Centauri Alchetron The Social EncyclopediaProxima Centauri ConstellationImagine The UniverseThe Next Earth May Be Even Closer Than We ImaginedPossible 2nd … Thank you for the definition of a light year - we all know that. The nearest star to our sun is Proxima Centauri, at a distance of 4.3 light-years from the sun. Would lower gravity make a person live longer? If you mean "other than the Sun", that would be Proxima Centauri, at a distance of about 4.2 light-years.150 million kilometers. 1 light-year = 9.460536x10^15 m, so you can figure it out for yourself. 'Secret weapon' gives GOP hope for Election Day, The New Yorker suspends Toobin after Zoom incident, Woman, 9 months pregnant, easily breaks 6-minute mile, 50 Cent appears to endorse Trump over Biden, Blue wave would rain $2.5 trillion stimulus: Analyst, SCOTUS blocks GOP effort to limit mail-in voting, With just days to go in the campaign, Trump rips toilets, WH ups stimulus offer as Pelosi's deadline looms.