A light year is a measurement of distance and not time, as the name might suggest. A light year is the distance a beam of light travels in a single Earth year, or around 9.7 trillion kilometres (6 trillion miles). On the scale of the universe, measuring distances in kilometres or miles just doesn’t cut it. In the same way that you may measure the distance to the supermarket in the time it takes to drive there, astronomers measure the distances of stars in the time it takes for their light to travel to us. For example, the nearest star to our Sun, Proxima Centauri, is 4.2 light years away.
Bu hikaye All About Space dergisinin Issue 126 sayısından alınmıştır.
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Bu hikaye All About Space dergisinin Issue 126 sayısından alınmıştır.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber? Giriş Yap
MYSTERIES OF THE UNI WHERE ARE ALL THE SPIRAL GALAXIES?
There are far fewer spiral galaxies than elliptical ones in the Supergalactic Plane, and scientists are keen to discover why
ZOMBIE STARS
+10 OTHER TERRIFYING SPACE OBJECTS
HOW TO BEAT LIGHT POLLUTION
Thought it was impossible to observe the wonders of the night sky from towns and cities? Think again. Follow our tips and tricks on successfully observing through sky glow
15 STUNNING STAR CLUSTERS
These beautiful stellar groupings are spattered across the cosmos
Eileen Collins "It was a difficult mission...we were the first to see Mir"
Having served as both the first female pilot and first female commander of NASA's Space Shuttle, Collins boosted the involvement of women in space exploration to a whole new level
MARS LEAKS FASTER WHEN IT'S CLOSER TO THE SUN
The Red Planet has lost enough water to space to form a global ocean hundreds of kilometres deep
FUTURE TECH KANKOH-MARU
This ambitious reusable spacecraft will be capable of taking 50 people to and from orbit
THE FINAL FRONTIER
Beyond the reach of the Sun is a fascinating region of the cosmos that were only just beginning to explore
A long-lost moon could explain Mars' weird shape and extreme terrain
A long-lost moon could explain why Mars is so different from the other rocky planets in the Solar System. Today Mars has two tiny moons.
A sprinkling of cosmic dust may have helped kick-start life on Earth
Cosmic dust may have helped kick-start life on Earth. New findings challenge a widely held assumption that this wasn't a plausible explanation.
