Light

How Do Astronomers Detect Exoplanets?

Astronomers usually detect exoplanets indirectly, by measuring how a planet changes the light, motion, or gravitational behavior of its host star.

The latest images of galaxies spiraling together.

The Gemini North telescope, located atop Maunakea in Hawaii, USA, has discovered interacting spiral galaxies approximately 60 million light-years away in the constellati…

Mysterious lights hovering in the night sky have left many people bewildered.

A strange phenomenon was observed by many residents in the sky near San Diego on the evening of June 27th.

How many years would it take to explore the universe while traveling at the speed of light?

The speed of light, equivalent to 299,792,458 m/s, is considered the maximum speed limit revealed by Einstein's theory of relativity.

12 'unbelievable' inventions of Nikola Tesla

Video: Aurora Borealis and meteor shower appear simultaneously

The combination of the aurora borealis and the Perseid meteor shower is a rare and spectacular event that leaves many sky enthusiasts in awe.

At 250 million light-years in diameter, how massive is the Boötes void?

The Boötes void or giant void is a very large, nearly spherical region containing very few galaxies. It is located in the vicinity of the constellation Boötes.

How is the age of the universe calculated?

The universe is about 13.8 billion years old, but how do we know that?

6 Walking Techniques That Strengthen Bones Better Than Supplements After 45

Strengthen bones after 45 with 6 walking techniques — brisk walking, hill climbing, stair climbing, interval training, uneven terrain, and light weights.

Object 10 million times brighter than the Sun, breaks the laws of physics

An X-ray-emitting star located in the Messier 82 galaxy about 12 million light-years from Earth is so bright it breaks the laws of physics.

'Monster' scarier than black holes, what exactly is a quasar?

To date, there are still many unknown and uncertain aspects about the properties and behavior of quasars.

Are there many planets with life?

We know that one in five stars has an Earth-like planet. There are 200 billion stars in our galaxy alone.

'Excavating' the unthinkable: 9 billion year old 'light fossil'

A timeless treasure that surpasses all previous records has been unearthed by Canadian scientists in James Webb's astonishing archive: A near-missed fossil of light.

What is a spacecraft 23 billion kilometers from Earth doing?

The twin spacecraft Voyager 1 and Voyager 2 continue to explore the universe 45 years after launching from Earth and 22 light hours away from the planet.

Stunning photos of the last super blood moon of the decade

People in America and Europe had a memorable night with the appearance of the last supermoon and total lunar eclipse of the 2010s.