Suppose you slammed together two neutrons at near-luminous speed. The resulting collision would create a cascade of particles from protons, electrons, and neutrinos to more exotic fare. We can't predict the exact number or type of particles produced, but we do know one thing: the total charge of all the particles would be zero. This is because charge is a conserved quantity, and since the neutrons have zero total charge, their resulting particles must have the same.
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Round 2: Watch Senate hearing for Jared Isaacman's re-nomination as NASA chief on Dec. 3
The U.S. Senate will hold its second hearing to consider billionaire tech entrepreneur Jared Isaacman's nomination for NASA chief on Wednesday (Dec. 3), and you can watch the action live.
Could future astronauts build houses on Mars with bacteria?
Would you like to live in a house on Mars made with Earth bacteria and Martian rocks?
Tiny Sparks of Lightning Detected on Mars for the First Time
The microphone on NASA's Perseverance rover unexpectedly heard tiny claps of thunder from sparks caused by colliding dust grains.
Looking to level up your photography? You can still save $1100 on this pro-level Sony mirrorless camera
Cyber Monday may be over, but there are still bargains to be had. Save over $1000 on the Sony A7R V: "a fantastic all-round camera that can handle most things you throw at it."
30 years of SOHO staring at the sun | Space photo of the day for Dec. 2, 2025
This year marks 30 years of SOHO observing our sun, an extraordinary milestone for a mission originally expected to last only about three years.
One of the best Lego Star Wars UCS sets is still £160 off in the UK with this Cyber Monday deal, but you'll have to be fast
Move over, Millennium Falcon, the Lego Star Wars UCS Venator starship is amazing value and it's £160 off right now! Hurry before it disappears into hyperspace.
That's one small step for trivia: An Apollo space quiz
Test your cosmic knowledge with this thrilling Apollo-themed space quiz—where lunar legends and NASA milestones collide!
A dying satellite could use its final moments to photograph the infamous asteroid Apophis in 2029
The Australian company HEO Robotics wants to join efforts to study a rare space event, conducting its own flyby of the asteroid Apophis when it makes its close approach to Earth in 2029.
These last-chance Cyber Monday streaming deals are still live, but not for much longer
You can still get some amazing sci-fi streaming content if you're quick, as Paramount Plus and Apple TV's Cyber Monday deals are still available.
With Cyber Monday over, you can still save $50 on this smart telescope, our expert called 'small but mighty'
Our astronomy expert, Gemma Lavender, was seriously impressed with the ZWO Seestar S30. It's still $50 off in a Cyber Monday sale, but you'll have to hurry.
New Radar Data Dries Up Hope For Subsurface Liquid Water On Mars
Remember back in 2018 when there was a discovery of a briny “lake” underground near the Martian south pole? Pepperidge Farm probably does, and anyone that works there that’s interested in space exploration will be disappointed to hear that, whatever might be causing the radar signal that finding was based on, it’s most likely not a lake. At least according to new data collected by the Mars Reconnaissance Orbiter (MRO) and published recently in Geophysical Research Letters by lead author Gareth Morgan of the Planetary Science Institute and his colleagues.
Trump pick for NASA chief Jared Isaacman pledges to move space shuttle Discovery to Houston, lawmaker says
Jared Isaacman, President Trump's pick to lead NASA, is on board with moving the space shuttle Discovery to Houston, according to one of the senators behind the controversial plan.
Sun-watcher SOHO celebrates thirty years
On 2 December 1995 the ESA/NASA Solar and Heliospheric Observatory (SOHO) blasted into space – on what was supposed to be a two-year mission.
SpaceX launches 60th mission of the year from California
A SpaceX Falcon 9 rocket launched 27 Starlink internet satellites early Tuesday morning (Dec. 2). It was the company's 60th liftoff of 2025 from the Golden State.
Live coverage: SpaceX to launch 29 Starlink satellites on Falcon 9 rocket from Cape Canaveral
File: A Falcon 9 rocket stands in the launch position at Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station ahead of the planned liftoff of the Starlink 6-61 mission on Oct. 22, 2024. Image: Adam Bernstein/Spaceflight Now
SpaceX is preparing for its third Falcon 9 launch in less than two days. The company is targeting a late afternoon flight from its workhorse pad at Cape Canaveral Space Force Station in Florida.
Arianespace launches South Korean Earth observation satellite on Vega-C flight
An Arianespace Vega-C rocket lifts off from Europe’s Spaceport in Kourou, French Guiana, on Dec. 1, 2025, carrying South Korea’s KOMPSAT-7 satellite. Image: ESA-CNES-Arianespace/Optique Vidéo du CSG – S. Martin
South Korea’s latest Earth observation satellite was delivered into a Sun-synchronous orbit Monday afternoon following a launch onboard a Vega-C rocket by Arianespace.
Scientists discover 53 powerful quasars shooting out jets up to 50 times wider than our Milky Way
"The sizes of these radio jets are not comparable to our solar system or even our galaxy."
It's your last chance to unlock a world of science fiction and science fact for just $2.99 a month with this HBO Max offer
From 2001 to Dune: Prophecy to Wild Wild Space, HBO Max is packed with movies, shows and documentaries, and you can save big on a full year of this streaming service, but you'll have to hurry!
Looking for a last-minute bargain? These Cyber Monday streaming, Lego and drone deals are must-haves, but time's running out, so you'll have to hurry
Here's a quick, one-stop shop of the best last-minute must-get Cyber Monday streaming, Lego and drone deals still available, but they won't be for long.
