Vertical while line in a blue sky.

Watch night launch of SpaceX Falcon Heavy June 24

Liftoff is targeted at 11:30 p.m. EDT, with a 4-hour launch window. SpaceX is calling the launch its most difficult ever, because the rocket must release 24 satellites into 3 different orbits.

Video: Watching solstices and equinoxes from space

See how sunlight falls on Earth’s surface during the solstices and equinoxes, and get a better understanding of why Earth’s tilt causes the seasons.

Far side of the moon in false-color.

What is the mystery mass on the moon?

Scientists have discovered a massive subsurface deposit of dense material – probably metal – beneath the largest crater on the moon. Did it result from a huge asteroid impact or a former lunar ocean of molten rock?

Bright flaming yellow-orange ball on black background

Could a superflare happen on our sun?

New research suggests that superflares – massive bursts of energy from a star’s surface – can happen on stars like our sun. What might that mean for us on Earth?

Helicopter propeller mounted on a metal stand, resting on a tabletop.

Mars Helicopter passes key tests

The Mars Helicopter will launch with Mars 2020. It’ll be the first vehicle in history to attempt to establish the viability of heavier-than-air vehicular flight on another planet. Plus … space engineers celebrate with a selfie after attaching the Mars 2020 rover’s remote sensing mast.

Today in science: Sally Ride in space

She was the 1st American woman in space, eventually flying on 2 Space Shuttle missions. She played a key role in the investigation of the Space Shuttle Challenger disaster. And she inspired people.

"Lunar flare" spot on the moon.

What causes flashes on the moon?

People have reported seeing Transient Lunar Phenomena – unusual flashes and other lights on the moon – for at least 1,000 years. Yet they’re still mysterious. Now a scientist in Germany is using a new telescope to try to solve the mystery.

White diagonal lines across a black background. White dots of various sizes scattered across the image.

US astronomers speak on SpaceX Starlink satellites

The American Astronomical Society – chief organization for US astronomers – said it is in conversations with SpaceX about the impending launch of 12,000 Starlink satellites. The astronomers worry the satellites will interfere with their work of understanding the universe.

Exoplanet landscape, composed by an artist.

IAU invites countries to name exoplanets

Nearly 100 countries have already signed up to organize national campaigns, to provide the public with an opportunity to vote. The deadline is July 30 to express interest in organizing a national campaign. The IAU will announce results in December.

Filament-like rocks.

Will evidence for life on Mars look like fettuccine pasta?

The search for life on Mars usually involves looking for past or present microbes, invisible to the eye. Scientists at University of Illinois suggest searching instead for a type of rock formation known on Earth to be created by microbes.