Starlink satellites - a line of bright dots against a black night sky - soaring overhead.

Wow! The SpaceX Starlink satellite train

“Here is the video I shot, be prepared to be mind-blown!” Marco Langbroek wrote on his website SatTrackCam Leiden (b)log, where he shared an amazing capture of dozens of SpaceX Starlink internet satellites chugging along, in a straight line, across the heavens.

Image of rad planet Mars with a rectangular white ticket on top of it.

Send your name to Mars

Want to send your name to Mars on NASA’s next rover mission in 2020? You’ll get your name etched on a microchip affixed to the rover – and a souvenir boarding pass. Here’s how.

Huge double asteroid to pass safely May 25

Although it won’t be visible to the eye, professional and amateur astronomers are watching for asteroid 1999 KW4. It’s oddly shaped, about a mile wide, with a companion moon. Closest approach is May 25, 2019. Charts here for amateur observers across the globe.

Pluto in natural color.

New evidence for Pluto’s subsurface ocean

Does Pluto have an ocean? That idea seems preposterous at first, but a new study adds to the growing evidence for a subsurface ocean on this distant dwarf planet … and explains how it stays liquid.

Side-by-side photos of moon's near and far sides.

Why the moon’s near and far sides look different

New research suggests that a wayward dwarf planet collided with the moon in the early history of the solar system, causing the stark difference between the moon’s heavily-cratered far side and the lower-lying open basins of its near side.

What Chang’e 4 learned from the moon’s far side

Early results from China’s historic 1st landing on the moon’s far side. Chinese scientists have used in situ data from a far side crater to identify materials on the moon’s surface that originated deeper inside the moon.

Two alternating images of bump gray square. Second image shows lighter spot in the center.

See Beresheet spacecraft’s impact site on moon

NASA released before and after images of the spot on the moon where Israel’s Beresheet spacecraft crash-landed on April 11.

Water vapor leaving Mars' atmosphere.

Scientists find new periodic water cycle on Mars

A new study shows that Mars has a unique water vapor cycle that occurs only once about every 2 years. The cycle might help explain how Mars lost most of its water.

Image of a galaxy, with bright blue stars and pink nebulas on one side.

Close encounter sets galaxy ablaze with new stars

A cosmic collision in action. Read more about what happens when 2 galaxies sideswipe each other.

Planet destroyed by white dwarf star.

How some planets can survive their stars’ deaths

A new “survival guide for exoplanets” outlines how different kinds of planets fare when their host star dies. It suggests the smallest rocky worlds are the most likely to escape annihilation.

Animated map of lines along a tan terrain.

Video: Fly over Curiosity’s route on Mars

Follow the route of NASA’s Curiosity Mars rover, as it moves to a new part of Mount Sharp, into an area scientists call the “clay-bearing unit”.

Dwarf planet Haumea and ring.

New insights about Haumea’s enigmatic ring

Dwarf planet Haumea orbits in Pluto’s realm of the solar system. It’s the most distant little world known to have a ring. Scientists in Brazil have new insights on how Haumea’s ring maintains its nearly perfect circular shape.

Gray and white pattern, with smaller black blobs.

Shrinking moon might be generating moonquakes

The moon is shrinking as its interior cools. As it shrinks, its crust wrinkles and cracks, forming “thrust faults” that, according to a new analysis, generate moonquakes.

A thin blue-white arc across a black background.

How Venus and Mars can teach us about Earth

The atmospheres of our 2 neighbors Mars and Venus can teach us a lot about past and future scenarios for our own planet.

The curve of the Earth viewed from orbit, with a kite-shaped sail above it.

Lightsail 2 set to launch in June

“We are go for launch!” said Planetary Society CEO Bill Nye. Funded by space enthusiasts, LightSail 2 aims to accomplish the 1st-ever, controlled solar sail flight in Earth orbit next month.

Simulating stars’ sounds to reveal their secrets

“A cello sounds like a cello because of its size and shape,” said astronomer Jacqueline Goldstein. “The vibrations of stars also depend on their size and structure.”

Asteroid hitting Earth.

Asteroid strike simulation blasts New York City

It seems like play, but they’re serious. Every year, at the Planetary Defense Conference, asteroid experts from around the globe run days-long simulations of asteroids headed for major cities. In 2019, it was New York City’s turn.

What Mars’ giant dust storm taught us

Before we send people to Mars, we need to understand more about how Martian dust could affect astronauts and their equipment. Here are 3 things we’ve learned from the planet’s 2018 global dust storm.

Photographic image showing flat galactic disk. The inset shows dark lanes of dust, where stars form.

Star formation burst created 50% of Milky Way disk stars

Analysis of data from the Gaia satellite shows a powerful burst of star formation – a stellar baby boom – in our Milky Way galaxy 2 to 3 billion years ago. This single burst might have created half the stars in the galaxy’s flat disk.

Chandrayaan-2 near moon.

India aims for 1st landing near moon’s south pole

The moon’s south pole has never been explored from the ground, but India’s new Chandrayaan-2 mission will attempt a 1st-ever landing there, with a rover, this September.