Since July 2025, the European Space Agency’s pair of Proba-3 satellites has already created 57 artificial solar eclipses. So far, the mission has collected more than 250 hours of high-resolution videos of the Sun’s atmosphere, called the corona. That’s the same amount of observing time as about 5000 total solar eclipse campaigns carried out on Earth.
(This is Part 2 of a series on neutrinos, Majorana fermions, and one of the strangest open questions in physics. Read Part 1 first.)
Every electronic device you have ever owned shares a critical weakness. Push it past roughly 200 degrees Celsius and it begins to fail. Your phone, your car's computer, the satellites orbiting above your head right now, all of them have the same thermal ceiling baked into their design. For decades, that ceiling has been one of the most stubborn walls in engineering. Now, a team at the University of Southern California may just have broken through it.
How does something come from nothing? It is perhaps the most profound question in all of science and one we still cannot fully answer. How did a barren, lifeless planet transform itself, over billions of years, into a world teeming with life? Where did it actually begin?
Look up at a full Moon on a clear night and you are staring at a face that has been punched, gouged, and battered for four billion years. Those dark patches are vast basins blasted open by impacts so colossal they reshaped a world. The lighter highlands are pocked and pitted, crater upon crater, each one a frozen record of a collision that happened long before humans walked the Earth. Unlike our own planet, the Moon has no weather to smooth things over, no rivers to fill the hollows and no wind to soften the edges. What hits it, stays.
Experience the Aug. 12, 2026 total solar eclipse from Spain and Iceland with festivals, spa sessions and skywatching events along the path of totality.
The Artemis 2 astronauts are back on Earth, and they've begun processing their historic moon mission. But it's still tough for them to put the experience into words.
On March 25, 1938, a 31-year-old physicist named Ettore Majorana bought a ticket for a ferry from Palermo to Naples. That night, before boarding, he sent a letter to Antonio Carrelli, director of the Naples Physics Institute:
On Episode 205 of This Week In Space, Rod Pyle and Tariq Malik discuss the flight of Artemis 2.
Northrop Grumman's second "Cygnus XL" cargo ship launched toward the International Space Station on Saturday morning (April 11).
NASA doesn't plan to rest on its laurels after the historic success of its Artemis 2 moon mission. Here are the agency's ambitious plans for Earth's nearest neighbor.
NASA's Artemis 2 astronauts came home today (April 10), wrapping up an epic mission that broke spaceflight records and set the stage for even more ambitious moonshots to come.
Ten undergraduate students from the University of Chicago made an astounding discovery using data from the Sloan Digital Sky Survey (SDSS). As part of their "Field Course in Astrophysics," they located one of the oldest stars in the Universe living in the Milky Way. The star, SDSS J0715-7334, is a red giant with 29 times as much mass as our Sun, located 79,256 light-years away. But here's where things truly get interesting: according to their findings, this star wasn't born in the Milky Way, but migrated here from another galaxy. The team is led by Professor Alex Ji, the deputy Project Scientist for SDSS-V, and graduate teaching assistants Hillary Andales and Pierre Thibodeaux.
Jupiter and Saturn, the two largest planets in the Solar System, are known for their large and varied systems of moons. At present count, Jupiter has more than 100 moons, while Saturn has more than double that, with over 280 known satellites. However, Jupiter's system of satellites includes four large moons - Io, Europa, Ganymede, and Callisto - and this system contains the largest moon in the Solar System (Ganymede). Meanwhile, Saturn's system of satellites is dominated by one large moon (Titan), the second largest in the Solar System.
Thousands of enthusiasts, professionals and curious skywatchers will gather this weekend for the world’s largest and most spectacular astronomy and space expo.
The Artemis 2 heat shield undergoing inspections at the Kennedy Space Center before installation on the base of the Orion capsule bringing four astronauts back to Earth Friday after a flight around the moon. The heat shield is designed to protect the craft from re-entry temperatures as high as 5,000 degrees. Image: NASA.
When the Artemis 2 Orion crew capsule returns to Earth after flying around the moon, it will hit the discernible atmosphere some 75 miles above the Pacific Ocean at a blistering 24,000 mph, fast enough to fly from New York to London in less than 10 minutes.
A newly released NASA timelapse reveals the moon crossing the sun as seen from deep space, giving the Artemis 2 crew a rare extended view of totality and the solar corona.
The nebular hypothesis states that stars and the planets that orbit them form from the same reservoir of material, called a solar nebula. It's the most commonly accepted explanation for how solar systems form. But despite its ability to explain many things about solar system formation, there are some outstanding questions.
A rare long-period comet returns after 170,000 years — here's how to find comet C/2025 R3 (Pan-STARRS) before sunrise this April, with key dates, viewing tips and the best mornings to look.
The Vera C. Rubin Observatory will discover up to 500,000 solar system objects every year. It’s already starting to deliver on that promise.
We chat with "For All Mankind" creators Ben Nedivi and Matt Wolbert about season 5's dramatic arc, scientific accuracy, and real-world parallels.
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