0
The nearest star - apart from our Sun is 4.2 light years away
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
The solar system contains about one billion stars?
The solar system contains only ONE star - Our Sun.---I think you may be thinking of Galaxies - our own being the Milky Way, which contain anything from 10 million to a trillion stars.The Solar System is (as the name tells you) the system of objects around the star Sol which is the name of our Sun. The Solar system includes the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Uranus and the dwarf planets Pluto, Makemake,Ceres, Eris and Hawmea (with loads more to follow probably). There are also a couple of asteroid belts between planets and the solar system ends with the Kuiper Belt which has a whole load of probable dwarf planets, rocks, ice etc in a donut shape about 30-55AU from the Sun.Further out there is a cloud of comets and rocks called the Oort cloud which is about a quarter of the way to the nearest star (1ly) which is the last thing that could be considered part of the Solar System.1 ly is a Light year, the distance light can travel in a year - about 9,000,000,000,000 km1 AU is the distance from the Earth to the Sun (about 8 light minutes)Feeling small yet? The universe is a big place!
What is the definition of passive filter?
i dnt knw so 1ly i am asking u ?
Why the power factor of semiconverter is better than full converter?
because semi converter has 1ly 2 thyristor where else full converter has 4 thyrister..thn semi converter the rectification is through rectifier and diodes. but in ful converter no diodes is used 1ly 4 thyristers are used
Who lives 138- 142 oxford street London wd1 1ly?
No-One lives at London WD1 1LY as there is no such postcode associated with London. WD is the postcode pre-cursor for Watford which is in Hertfordshire. Oxford Street, London (The famous one) is in the city of Westminster which means it holds the WC Pre-Cursor.
Where is sunny ville located?
Sunny Ville, Moor Rd, Bellerby, Leyburn, North Yorkshire DL8 5QX, UKSunny Ville, ML Dahanukar Rd, Tardeo, MumbaiSunny Ville, Shutta, Looe,PL13 1LY, UKwhich one do u need
I heard a boy who could many phyical relation with girls or a doctor can find girl varginity without touching her 1ly watchd by her physical structure?
That's not a question. That is a random stream of conscience. Punctuation can help, as well as other basic spelling and grammar. So, figure that out, then try again with that question. Also, you put it in the wrong category. This is Entertainment & Arts.
How far into space has the first radio waves traveled?
Since radio WAVES travel at or near the speed of light in space they have traveled the same number of years from broadcast date to the current date, In Example IE: Radio transmitted in 1920 would have gone 90 light years by 2010. How ever there seems to be some question as to how far those waves can travel prior to loss of the ability to detect them. SETI (I THINK) believes that the newest array they have could detect our oldest radio from the 1920s up to or about 50 to 100 light years away. The more sophisticated and sensitive the equipment the weaker the signal you can detect. A radio WAVE is like an expanding ball getting weaker for many reasons as it travels through space. Some signal is "reflected" to other directions from some material, and some material will absorb the waves. However, even a degraded signal that could not be received as a sound radio channel would still give a "SINGLE Freq. Noise" for many more light years. In nature "Single Freq. Noise" does not happen, As far as we know currently. So even if we were or ET was to receive a radio signal that was just "Noise" but on a single frequency, that would mean most likely an advanced or at least tech society had created it.In simple terms, here is how to do the math:light travels around 5.879Trillion Miles in a year. (1LY[lightyear])multiply that by 90, you get 529.1Trillion miles. so our first transmission are roughly that distance away from earth.now, that might seem extremely far... but it really isn't in terms of ET, based on the distance of stars, that only passes a few stars, and who says every star gets life.But as the question asks specifically 'how many' then answering 'a few' is not very illuminating, the following may be the best estimate.As a function of distance, the Gliese star catalog lists the following number of stars. A parsec is 3.26 light years.Distance Number DensityDistance from Sun in parsecsnumber of starsstars/cubic parsec5630.120103280.0781510080.0712021270.0632534960.053 http://www.stellarium.com/nearstar/nearby.htmlSo as our first radio transmissions are now (2011) approaching 90 years old it may be that we have broadcast to 4000 plus stars.
