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The U.K. rocket startup Skyrora tested its Skylark Micro suborbital rocket last year. In the future, the company's rockets will be powered by a renewable fuel made from non-recyclable plastics.

Can biofuels make spaceflight greener? UK space startups reveal plans for cleaner rocket launches

By Tereza Pultarova

Two British start-ups claim their biofuel-based rockets produce much less carbon emissions and dangerous soot particles than their fossil fuel-powered counterparts.

Very early observations of Saturn's moon Iapetus revealed the extreme color contrast on its surface. The light and dark features give the moon a distinctive yin and yang appearance.

On This Day in Space! Oct. 25, 1671: Saturn's Yin-Yang Moon Iapetus Discovered by Giovanni Cassini

By Hanneke Weitering

On Oct. 25, 1671, the Italian astronomer Giovanni Cassini discovered a new moon at Saturn! See how it happened in our On This Day In Space series.

Adam Dipert space juggler

Space juggling and dance could make suborbital flights more fun

By Elizabeth Howell

A 'space juggler' plans to release a film shortly about the joys and challenges of doing performance art in zero gravity.

An artist's depiction of large asteroids hitting early Earth.

Asteroids and comets pummeling Earth delayed rise of oxygen

By Samantha Mathewson

Remnants of ancient asteroids revealed Earth was bombarded by massive space rocks more often than previously thought, vastly altering oxygen levels in the planet's early atmosphere.

An artist's concept depicting the near-Earth orbital debris field, based on real data from the NASA Orbital Debris Program Office.

Steve Wozniak's stealthy space startup Privateer hires chief scientific adviser

By Mike Wall

Privateer aims to help humanity tackle its growing space-junk problem, and the startup has just hired one of the people who will lead this ambitious effort.

SpaceX's megarocket Starship tested its vacuum Raptor engine for the first time last week, paving the way for a possible debut orbital flight next month.

Pictures from space! Our image of the day

By Space.com Staff

SpaceX's Starship prototype fired its vacuum Raptor engine for the first time on Thursday last week ahead of a possible debut orbital flight in November.

Apple TV+'s new sci-fi series "Invasion" follows people around the world during an alien attack.

Here's a first look at 'Invasion' on Apple TV+ with show co-creator David Weil

By Scott Snowden

Apple TV+'s new sci-fi series "Invasion" follows people around the world during an alien attack. Here's our first look and interview.

Blade Runner: The Roleplaying Game will be released by Free League Publishing in 2022.

Free League Publishing's new 'Blade Runner' tabletop game will let you hunt down rogue Replicants (exclusive)

By Jeff Spry

Free League Publishing unites with Alcon Entertainment to deliver a dark new "Blade Runner" roleplaying game for 2022.

This photo from the Hubble Space Telescope shows two galaxies, NGC 7752 and NGC 7753, interacting as a single object called Arp 86 220 million light-years from Earth in the constellation Pegasus.

Hubble telescope spots a pair of 'squabbling' galaxies locked in cosmic dance

By Elizabeth Howell

The research may shed light on cosmic evolution.

Every incarnation of "Battlestar Galactica" has featured some of the best looking spacecraft ever seen in science fiction and it shows in the new book "Battlestar Galactica: Designing Spaceships."

Here's an exclusive 1st look at 'Battlestar Galactica: Designing Spaceships' from Hero Collector

By Scott Snowden

Hero Collector's new book "Battlestar Galactica: Designing Spaceships" features an incredible collection of never-before-seen concept artwork .

Elaborate stone patterns created by ice needles.

Thousands of tiny 'ice needles' may explain mysterious stone patterns on Earth … and Mars

By Joanna Thompson

Tiny natural ice structures help arrange stones into spectacular landscapes.

An artist's depiction of the dinosaur-killing asteroid, which left a 124-mile-wide crater in the planet's surface.

What happened when the dinosaur-killing asteroid slammed into Earth?

By Stacy Kish

The asteroid that crashed into Earth 66 million years ago unleashed a catastrophic series of events.

wormhole illustration

5 sci-fi concepts that are possible (in theory)

By Andrew May

Some of the most common and unlikely sci-fi tropes could one day be science fact.

China test-fired a massive new solid-fueled rocket motor on Oct. 19, 2021.

China just test-fired a massive solid-fueled rocket

By Andrew Jones

China has test fired a huge new solid rocket motor, creating more propulsion options for the country’s growing space activities.

An Arianespace Ariane 5 rocket carrying the SES-17 and Syracuse 4A communications satellites for SES and France's Ministry of Defense, respectively, lifts off from the Guiana Space Center in Kourou, French Guiana at 10:10 p.m. EDT (0210 GMT) on Oct. 23, 2021.

Ariane 5 rocket successfully launches two satellites into orbit on its heaviest mission ever

By Elizabeth Howell

An Ariane 5 rocket will launch satellites for SES and the French military tonight, Oct. 23, and you can watch it live here.

Astrophotographer Jeff Berkes captured this photo of a Taurid meteor over Assateague Island National Seashore along the eastern shore of Maryland around 2:30 a.m. on Saturday, Nov. 5th. The Taurid meteor shower <a href=http://www.space.com/34587-taurid-meteor-shower-guide.html>will be visible</a> through late November.

An overview of the fall skies of 2021

By Joe Rao

There's a lot to look at between now and the December solstice: two eclipses, four meteor showers, Venus reaching its pinnacle in brilliance and a potential bright comet!

An illustration showing an asteroid being pulverized to pieces.

Researchers want to 'slice and dice' deadly asteroids with rocket-powered bombs, new paper says

By Brandon Specktor

Physicists propose a new plan to "slice and dice" incoming asteroids that could save Earth from a deadly calamity.

A polynya grows in the Last Ice Area above Canada’s Ellesmere Island. The gap in the ice was open for around two weeks in May 2020 due to strong, anticyclonic winds in the Arctic.

Huge hole discovered in Arctic's 'last ice'

By Stephanie Pappas

A polynya, or rift, opened in the Arctic's oldest, thickest ice in May 2020, new research finds.

Experts recently shared that they think the U.S. needs to seriously invest in nuclear technology to stay ahead of CHina in space.

NASA thinks US needs nuclear-powered spacecraft to stay ahead of China

By Chelsea Gohd

The U.S. needs to invest more in nuclear-powered spacecraft to be competitive with nations like China, experts say.

Mercury will reach dichotomy, meaning the planet appears half-illuminated as seen from Earth, on Oct. 23, 2021.

How to spot the 'elusive' planet Mercury in the night sky this month

By Joe Rao

For the next two and a half weeks, early-morning skywatchers will have an excellent opportunity to spot the so-called "elusive planet" — Mercury.