Space and Time Continuum

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What does Mercury in retrograde mean?

Three or four times a year, planet Mercury is said to go retrograde — that is to say it moves in an opposite direction to planet Earth. Planets move …

Astrology

'Streetlights of the Universe': Can we solve the mystery of dark energy?

Scientists use the term "dark energy" to describe the mysterious phenomenon that our universe is expanding at an accelerated rate.<p>We don't yet know …

Dark Matter

33 out-of-this-world images of the Milky Way, aurora borealis and more

Astronomy Photographer of the Year contest reveals dozens of photos before winners are announced.<p>An aurora borealis that lights up the night sky in …

Astronomy

Astronomers just discovered a dozen more moons around Jupiter

A team of researchers scanning the farthest reaches of our solar system have inadvertently discovered 12 additional moons orbiting Jupiter. This …

Astronomy

Why NASA wants to 'touch the sun'

The Parker Solar Probe will explore the sun's scorching outer atmosphere.<p>The sun, the very centerpiece of our solar system and the most important …

Astronomy

This is the first photo of a planet being born

Scientists train their equipment on young star's suspected baby bump.<p>It may not be the most adorable baby picture you've ever seen, but this image of …

Asteroid with a 13-mile-high mountain is now visible to the naked eye

Look up in nighttime sky anytime between now and July 16, and you just might spy our solar system's brightest asteroid.<p>Vesta, a 326-mile-wide object …

NASA discovers unique exoplanet with 'smothering' atmosphere

'Death planet' defies expectations for how alien worlds are formed.<p>Planets that orbit other stars outside our solar system, known as exoplanets, come …

Incoming asteroid will test NASA's planetary defense network

The close approach in October will expose both the strengths and limitations of humanity's ability to detect and track asteroid threats.<p>On July 23, …

NASA's new tour of the moon will leave you howling

With planetary celebrities like Jupiter, Saturn and Pluto pulling the celestial spotlight in recent years, it's easy to forget that one of the most …

Clouds of spinning diamonds linked to Milky Way mystery

Chance discovery helps solve a riddle over microwave radiation.<p>More than 20 years ago, NASA's COBE (Cosmic Background Explorer) spacecraft captured …

NASA's New Horizon wakes up, prepares for New Year's Day flyby of 'Ultima Thule'

More than a billion miles and almost three years after its remarkable flyby with Pluto in 2015, NASA's New Horizon spacecraft is once again awake and …

Planet or not, you can't discount the extraordinary beauty of Pluto

Everyone's favorite celestial outcast may not be an official planet, but that doesn't mean we're any less fascinated by it.<p>In the time-lapse video …

Astronomers announce discovery of the most-distant oxygen in the universe

The sun's final performance may be more spectacular than we thought

It's a shame we won't be around to see it.<p>Even that great fiery drama queen that is our sun will one day exit stage left.<p>But when it does take its …

Imagine what the sun looks like from other planets

Artist Ron Miller combines his love of space and art into creative paintings of our solar system.<p>Have you ever wondered what it would be like to …

Scientists have figured out when and how our Sun will die

Astronomers witness birth of massive galaxy cluster

Discovery of 14 galaxies merging into one incredible celestial structure stuns researchers.<p>Billions of years ago, well before our own solar system …

Universe

NASA Wants To Probe Deeper Into Uranus Than Ever Before

Up until now, NASA has never paid too much attention to Uranus – but now the space agency wants to take a good, long look. And one of the things it …

Dark matter might be way darker than we previously thought

It doesn't interact with forces other than gravity, study finds.<p>Dark matter is a theoretical type of matter that has been posited to make up about 80 …

Dark Matter

Astronomers Admit: We Were Wrong—100 Billion Habitable Earth-Like Planets In Our Galaxy Alone

Estimates by astronomers indicate that there could be more than 100 BILLION Earth-like worlds in the Milky Way that could be home to life. Think …

The most impressive photos from NASA

Alongside unlocking the secrets of our solar system, the <b>National Aeronautics and Space Administration</b> does a fine job of capturing some truly …

Could the clouds of Venus harbor life?

Venus, the second-brightest object in the night sky after our own moon, could harbor the potential to change our notion of life in the cosmos.<p>An …

Astronomy

7 astronauts reveal what it really feels like to live in space

Seeing our planet from space is a rare treat - fewer than 540 people have ever left the Earth.<p>Seven astronauts who've blasted off from our planet …

What are the heaviest objects in the universe?

These interstellar monsters weigh almost too much to comprehend.<p>The universe is a big place — really big — and it’s filled with some wondrously …

Black Holes

Hubble has 12 new images of Messier objects, and they're spectacular

Avid comet hunter Charles Messier crafted drawings of various celestial objects and published them as a book, "Catalogue des Nébuleuses et des Amas …

The weather at Jupiter's poles is truly frightful

NASA's Juno spacecraft reveals massive cyclones in the Jovian atmosphere.<p>Tour of Jupiter's north pole<p>In mid-April, NASA scientists shared an …

Astronomy

NASA wants to build a special submarine to explore Titan's oceans

To know if Saturn’s moon harbors life, we’ll need to plumb its waters.<p>On the heels of SpaceX sending a Tesla Roadster into space, NASA has revealed …

Christa McAuliffe's forgotten lessons will finally be taught from space

For the 25th mission of the U.S. Space Shuttle program, astronaut and educator Christa McAuliffe planned numerous lessons and demonstrations aboard …