How long is a light year in Earth years?
about 6 trillion miles
A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). One light year is equal to the distance that light travels in one year (it is about ten trillion kilometers, or six trillion miles). One light years is equal to approx 6.5×10^5 earht s years.
What is 16 light years away from Earth?
Designated HD 26965b, the newly-detected alien world has a mass of 8.47 Earth masses and is located a mere 16 light-years away. This planet revolves around the bright K-class dwarf star HD 26965 once every 42.4 days.
What star is 18 light years away?
aurora
WASHINGTON: Astronomers have discovered the first aurora outside our solar system, around a brown dwarf about 18 light years away from Earth, which is up to 10,000 times more powerful than any previously seen. An aurora is a natural light display in the sky, predominantly seen in the high latitude regions.
What is 20 light years away from Earth?
Researchers detected the planet orbiting one of Earth’s nearest stars, a cool red dwarf called Gliese 581, 20 light years away in the constellation of Libra. Measurements of the planet’s celestial path suggest it is 1½ times the size of our home planet, and orbits close to its sun, with a year of just 13 days.
How long does it take to get to the moon in light-years?
about 1.25 seconds
The Moon is about 1.25 Light Seconds away from the earth as the reflected sunlight from the Moon takes about 1.25 seconds to reach the Earth. OR in terms of light years 3.96 x 10−8 Light Years.
How many light-years can we see?
46 billion light years
In actuality, we can see for 46 billion light years in all directions, for a total diameter of 92 billion light years.
How many stars are in 10 light-years?
As of October 2012, astronomers have been able to detect planets in the Solar System and around Alpha Centauri B and Lalande 21185 among the nearest 12 stars….Stars within 10 light-years.
| NStED / RECONS / HIPPARCOS Distance (ly) | 4.22 |
|---|---|
| Name or Designation | Proxima Centauri |
| Spectral & Luminosity Type | M5.5 Ve |
| Solar Masses | 0.123 |
| Constellation | Centaurus |
How many light-years is the nearest star?
The nearest stars to Earth are in the Alpha Centauri triple-star system, about 4.37 light-years away. One of these stars, Proxima Centauri, is slightly closer, at 4.24 light-years.
What stars are within 40 light years?
List of star systems within 35–40 light-years
| Star system | Median distance (ly) | Spectral type |
|---|---|---|
| Theta Persei | 36.6 ± 0.3 | F7V + M1V |
| HD 115404 | 36.6 ± 0.4 | K2V + M1V |
| Arcturus | 36.7 ± 0.3 | K0III |
| ADS 48 | 36.7 ± 0.6 | KV |
How many stars are in 10 light years?
How many stars are in 1000 light years?
971 stars are within 50 light years. The space within 1000 light years is (1000/50)³ = 8000 times as large. Assuming a homogenous distribution you can expect 7 to 8 million stars in this range.
How many light years across is the universe?
93 billion light-years
The radius of the observable universe is therefore estimated to be about 46.5 billion light-years and its diameter about 28.5 gigaparsecs (93 billion light-years, or 8.8×1026 metres or 2.89×1027 feet), which equals 880 yottametres.