Universe Today:
- Plutonium in Earth Rocks Signals Long-ago Cosmic Collisionby Carolyn Collins Petersen (https://www.universetoday.com/authors/cc-petersen) on June 18, 2026 at 8:51 pm
A small lump of rock pulled up from the Pacific Ocean seafloor in 1976 is giving scientists new clues about an ancient cosmic event. More than a hundred million years ago, two neutron stars collided. The resulting energetic kilonova sent a rain of long-lived elements, such as isotopes of plutonium, through space. Eventually, this stellar "debris" settled onto Earth. Some sank to the bottom of the ocean and got incorporated into a chunk of ferromanganese rock. Hidden inside were a few hundred atoms of plutonium radioisotopes. They provide the strongest clues about what created them in the merger and how long ago it happened.
- What Would Happen if the Sun Stopped? Part 4: Black Hole Sunby Paul Sutter (https://www.universetoday.com/authors/pmsutter) on June 18, 2026 at 7:04 pm
Switch off fusion and, for ten thousand years, nothing happens. Then the Sun begins a slow, strange death: shrinking, briefly brightening, and coasting on gravitational heat for tens of millions of years. And the neutrinos give the whole thing away in just eight minutes.
- What Would Happen if the Sun Stopped? Part 3: The Photon Traffic Jamby Paul Sutter (https://www.universetoday.com/authors/pmsutter) on June 17, 2026 at 7:03 pm
A photon born in the Sun's core takes around 100,000 years to fight its way to the surface, bouncing through a random walk so inefficient that the light on your face is older than human civilization. Why the Sun's surface is a hundred-millennia-delayed broadcast.
APOD: Astronomy Picture of the Day:
- Post Titleon June 18, 2026 at 4:30 pm
Do you see that blue blob to the lower right of the image center?
- Post Titleon June 18, 2026 at 4:30 pm
How did a hamster wheel get into space? The Hamster Wheel Nebula (Longmore 8) was
- Post Titleon June 18, 2026 at 4:30 pm
While cruising around Saturn, be on the lookout for
NASA Breaking News:
- NASA Awards Contract for Commercial Satellite Data Acquisitionby Jessica Taveau on June 18, 2026 at 8:13 pm
NASA has selected eight new companies and will acquire new data products from six existing Commercial Satellite Data Acquisition contract holders to expand the range of commercial satellite data available to researchers, civil agencies, and decision-makers. Such measurements supplement NASA’s Earth satellites by contributing high-resolution and frequent observations to enhance the agency’s set of data.
- From Suriname to Space: Rohit Goeptar Shares His Journey to NASAby Jason Costa on June 18, 2026 at 7:06 pm
Rohit Goeptar was born into a poor family in Suriname, South America, the kind where both parents work three jobs and they still can only provide food and shelter for their family. At around age six, his family moved to California to start a new life. Only two years later, he moved back to South America
- Desert Field Test With NASA Advanced Rover Prototypeon June 18, 2026 at 6:29 pm
Description A prototype four-wheel rover developed at NASA’s Jet Propulsion Laboratory with advanced mobility and robotic autonomy capabilities trundled across the Colorado Desert near Plaster City, California, during a field test in March 2026. Called ERNEST (Exploration Rover for Navigating Extreme Sloped Terrain), the rover served here as a testbed for autonomy software developed for
- NASA Testing Advanced Capabilities for Moon, Mars Roversby Naomi Hartono on June 18, 2026 at 6:19 pm
On a bleak stretch of the Colorado Desert in Southern California, a compact four-wheeled rover recently trundled about 16 miles (26 kilometers) with minimal intervention from the team of engineers trailing it. Called ERNEST (Exploration Rover for Navigating Extreme Sloped Terrain), this prototype is being used by NASA to advance both robotic autonomy and the
- NASA’s Lucy Reveals Wobbling, Peanut-Shaped Asteroidon June 18, 2026 at 6:04 pm
Even small asteroids lead complex lives. During its flyby of the asteroid Donaldjohanson last year, NASA’s Lucy spacecraft revealed the asteroid to be a wobbly, peanut-shaped body that has undergone a lot of activity in its relatively short history. Formed as fragments coalesced after a violent collision 155 million years ago, the asteroid was transformed by the
Space Station News:
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Sky & Telescope Observing News:
- See Venus Disappear in Broad Daylight on June 17thby Bob King on June 17, 2026 at 3:12 pm
On June 17th, much of North America can watch the Moon occult Venus in the daytime sky. All you need are binoculars. The post See Venus Disappear in Broad Daylight on June 17th appeared first on Sky & Telescope.
- This Week's Sky at a Glance, June 12 – 21by Alan MacRobert on June 12, 2026 at 9:01 am
The three planets in the western twilight are pulling away from each other now. On Wednesday, the Moon will occult Venus in daylight. The post This Week's Sky at a Glance, June 12 – 21 appeared first on Sky & Telescope.
- This Week's Sky at a Glance, June 5 – 14by Alan MacRobert on June 5, 2026 at 9:04 am
Bright Venus and Jupiter pass through conjunction in twilight this week, while Mercury, Pollux, and Castor watch them from nearby. The post This Week's Sky at a Glance, June 5 – 14 appeared first on Sky & Telescope.
- Chance of Aurora Extends to Friday Night, June 5thby Bob King on June 5, 2026 at 12:45 am
A geomagnetic storm expected June 4th arrived late. But there's still at chance of seeing auroras Friday night, June 5th. The post Chance of Aurora Extends to Friday Night, June 5th appeared first on Sky & Telescope.
- Venus, Jupiter Converge in Stunning June 9th Dusk Conjunctionby Bob King on June 3, 2026 at 4:28 pm
A beautiful conjunction is coming, and all you need are your eyes to enjoy it. The post Venus, Jupiter Converge in Stunning June 9th Dusk Conjunction appeared first on Sky & Telescope.
Sky & Telescope – Explore the Night with Bob King:
- See Venus Disappear in Broad Daylight on June 17thby Bob King on June 17, 2026 at 3:12 pm
On June 17th, much of North America can watch the Moon occult Venus in the daytime sky. All you need are binoculars. The post See Venus Disappear in Broad Daylight on June 17th appeared first on Sky & Telescope.
- Chance of Aurora Extends to Friday Night, June 5thby Bob King on June 5, 2026 at 12:45 am
A geomagnetic storm expected June 4th arrived late. But there's still at chance of seeing auroras Friday night, June 5th. The post Chance of Aurora Extends to Friday Night, June 5th appeared first on Sky & Telescope.
- Venus, Jupiter Converge in Stunning June 9th Dusk Conjunctionby Bob King on June 3, 2026 at 4:28 pm
A beautiful conjunction is coming, and all you need are your eyes to enjoy it. The post Venus, Jupiter Converge in Stunning June 9th Dusk Conjunction appeared first on Sky & Telescope.
- Lost in the Star Clouds — A Milky Way Odysseyby Bob King on May 27, 2026 at 3:31 pm
I share my "discovery" of a new Milky Way star cloud that's been staring at me for ages. The post Lost in the Star Clouds — A Milky Way Odyssey appeared first on Sky & Telescope.
- Moon and Planets to Gather in Twilight Spectacle on May 18–20by Bob King on May 13, 2026 at 5:48 pm
Watch the crescent Moon dance with the planets when it returns next week. The post Moon and Planets to Gather in Twilight Spectacle on May 18–20 appeared first on Sky & Telescope.
Stardate Podcast: The crescent Moon charges through a rapidly disappearing group of bright stars and planets early this evening. Most of the group will be gone from view by the end of the month.
As twilight begins to fade, the planet Mercury is close below the Moon. Brighter Jupiter is the same distance to the left […] Like a cosmic butterfly, a cluster of young stars is just emerging from its cocoon – a cloud of gas and dust. The cocoon `spans about 45 light-years. But some of the beautiful butterfly is already in view. Parts of the gas cloud are lit up by the brightest of the infant stars taking shape there. […] The Sun’s closest planet is making a pretty good appearance in the early evening. As seen from Earth, it’s just about as far from the Sun as it ever gets. It looks like a bright star low in the west-northwest beginning shortly after sunset.
Mercury is getting ready to cross between Earth and […] A relic from the early universe is racing through Libra. It’s moving across the constellation at 800,000 miles per hour. That’s far faster than most of the stars around us. So it’ll move out of Libra in the blink of a cosmic eye.
The star is HD 140283. But it also has a nickname – the […] Every star in the night sky is moving – orbiting the center of the galaxy. Some are moving toward us, while others are moving away. We can’t see that motion because the stars are so remote. But we can measure it with special instruments – one of the most important techniques in astronomy.
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