Behold, directly overhead, a certain strange star was suddenly seen...
Amazed, and as if astonished and stupefied, I stood still.

— Tycho Brahe

Astronomy

Familiar faces return in 'Star Wars: Tales of the Underworld', which hits Disney+ on May the 4th (video)

Space.com - Wed, 04/02/2025 - 1:48pm
Disney has revealed its third animated Star Wars anthology series, which takes us deeper into the galaxy's darkest corners through the eyes of two infamous bounty hunters.
Categories: Astronomy

SpaceX Fram2 astronauts see 'pure white' Antarctica from polar orbit: Space photo of the day

Space.com - Wed, 04/02/2025 - 1:15pm
Fram2 crew was surprised to not see any evidence of human activity at the South Pole from 285 miles above.
Categories: Astronomy

X-ray Clues Reveal Destroyed Planet

NASA Image of the Day - Wed, 04/02/2025 - 1:10pm
In about 5 billion years, our Sun will run out of fuel and expand, possibly engulfing Earth. These end stages of a star’s life can be utterly beautiful – as is the case with this planetary nebula called the Helix Nebula. Astronomers study these objects by looking at all kinds of light. This images show X-rays from NASA's Chandra X-ray Observatory (magenta), optical light data from NASA's Hubble Space Telescope (orange, light blue), infrared data from the European Southern Observatory VISTA telescope (gold, dark blue), and ultraviolet data from GALEX (purple) of the Helix Nebula.
Categories: Astronomy, NASA

ESA's new documentary paints worrying picture of Earth's orbital junk problem

Space.com - Wed, 04/02/2025 - 1:00pm
The European Space Agency's new documentary short tackles the question of whether space debris has reached crisis level.
Categories: Astronomy

The epic quest to redefine the second using the world's best clocks

New Scientist Space - Space Headlines - Wed, 04/02/2025 - 12:00pm
A more precise definition of the second is crucial to all sorts of physical measurements – but to get there, scientists have to pack up their extraordinarily fragile optical clocks and take them on tour
Categories: Astronomy

The epic quest to redefine the second using the world's best clocks

New Scientist Space - Cosmology - Wed, 04/02/2025 - 12:00pm
A more precise definition of the second is crucial to all sorts of physical measurements – but to get there, scientists have to pack up their extraordinarily fragile optical clocks and take them on tour
Categories: Astronomy

US Space Force picks Rocket Lab and Stoke Space to compete for national security launches

Space.com - Wed, 04/02/2025 - 12:00pm
Private launch companies Rocket Lab and Stoke Space have been selected to compete for future U.S. national security space launches.
Categories: Astronomy

Plant skin grafts could result in new kinds of vegetables

New Scientist Space - Space Headlines - Wed, 04/02/2025 - 11:00am
A company in the Netherlands says it has perfected a way to create "graft chimeras" with the skin of one plant and the innards of another
Categories: Astronomy

Plant skin grafts could result in new kinds of vegetables

New Scientist Space - Cosmology - Wed, 04/02/2025 - 11:00am
A company in the Netherlands says it has perfected a way to create "graft chimeras" with the skin of one plant and the innards of another
Categories: Astronomy

The best new science fiction books of April 2025

New Scientist Space - Space Headlines - Wed, 04/02/2025 - 11:00am
From robot rights to ageing and climate change, this month’s science fiction squares up to the big topics, with new titles from authors including Nick Harkaway and Eve Smith
Categories: Astronomy

The best new science fiction books of April 2025

New Scientist Space - Cosmology - Wed, 04/02/2025 - 11:00am
From robot rights to ageing and climate change, this month’s science fiction squares up to the big topics, with new titles from authors including Nick Harkaway and Eve Smith
Categories: Astronomy

Space miso is nuttier than Earth miso — but it's still miso

Space.com - Wed, 04/02/2025 - 11:00am
Scientists have successfully fermented miso aboard the International Space Station, marking the first deliberate food fermentation in space that may open up new culinary possibilities for astronauts on long-term missions.
Categories: Astronomy

You can still get 73% Starz for three months and watch some Marvel content following the Avengers: Doomsday cast announcement

Space.com - Wed, 04/02/2025 - 10:37am
This streaming deal is a great alternative to Disney Plus as you can get three months of Starz for just $2.99 and watch Marvel content for less.
Categories: Astronomy

Webb snaps photographs of Asteroid 2024 YR4

ESO Top News - Wed, 04/02/2025 - 10:30am
Image:

This image shows Webb’s recent observation of the asteroid 2024 YR4 using both its Near-Infrared Camera (NIRCam) and Mid-Infrared Instrument (MIRI). Data from NIRCam shows reflected light, while the MIRI observations show thermal light.

On 8 March 2025, the NASA/ESA/CSA James Webb Space Telescope turned its watchful eye toward asteroid 2024 YR4, which we now know poses no significant threat to Earth in 2032 and beyond.

This is the smallest object targeted by Webb to date, and one of the smallest objects to have its size directly measured.

Observations were taken to study the thermal properties of 2024 YR4, including how quickly it heats up and cools down and how hot it is at its current distance from the Sun. These measurements indicate that this asteroid does not share properties observed in larger asteroids. This is likely a combination of its fast spin and lack of fine-grained sand on its surface. Further research is needed, however this is considered consistent with a surface dominated by rocks that are roughly fist-sized or larger.

Asteroid 2024 YR4 was recently under close watch by the team at ESA's Near Earth Objects Coordination Centre, located in Italy. Planetary defence experts from the Agency's Space Safety programme worked with NASA and the international asteroid community to closely watch this object and refine its orbit, which was eventually determined to not pose a risk of Earth impact. Read details on this unusual campaign via ESA's Rocket Science blog and in news articles here and here.

Webb’s observations indicate that the asteroid measures roughly 60 meters (comparable to the height of a 15-story building).

The new observations from Webb not only provide unique information about 2024 YR4’s size, but can also complement ground-based observations of the object's position to help improve our understanding of the object’s orbit and future trajectory.

Note: This post highlights data from Webb science in progress, which has not yet been through the peer-review process.

[Image description: A collage of three images showing the black expanse of space. Two-thirds of the collage is taken up by the black background sprinkled with small, blurry galaxies in orange, blue, and white. There are two images in a column at the right side of the collage. On the right side of the main image, not far from the top, a very faint dot is outlined with a white square. At the right, there are two zoomed in views of this area. The top box is labeled NIRCam and shows a fuzzy dot at the center of the inset. The bottom box is labeled MIRI and shows a fuzzy pinkish dot.]

Categories: Astronomy

Incredible photo shows supermassive black hole blowing a jet of matter into interstellar space

Space.com - Wed, 04/02/2025 - 10:00am
A spiral galaxy known as NGC 4945 exhibits powerful winds of material blowing from the supermassive black hole located at its core in a new photo taken by the Very Large Telescope in Chile.
Categories: Astronomy

Drone pilot who flew over Vandenberg Space Force Base sentenced to 4 months in jail

Space.com - Wed, 04/02/2025 - 9:00am
A California man has been sentenced to jail for flying a drone over Vandenberg Space Force Base and photographing the installation.
Categories: Astronomy

Psychology’s Groupthink Helps Explain the Signal Chat Fiasco

Scientific American.com - Wed, 04/02/2025 - 7:30am

At the heart of the Trump administration’s Signal scandal lies the familiar psychological pitfall of groupthink

Categories: Astronomy

Ultralight Dark Matter Could Explain Early Black Hole Formation

Universe Today - Wed, 04/02/2025 - 7:15am

Blackholes are a fascinating class of object to study. We have learned significant amounts over the years but one of the outstanding mysteries remains; how there were supermassive black holes with millions or even billions of times the mass of the Sun present in the first billion years after the Big Bang. Our current models of stellar mass black hole evolution and mergers cannot explain their existence. A new paper suggests that ultralight dark matter particles, like axions may have done the trick and provides a mass range for expected particles.

Categories: Astronomy

Weekend workouts can be as valuable as exercising throughout the week

New Scientist Space - Cosmology - Wed, 04/02/2025 - 6:00am
Squeezing exercise into one or two days a week seems to have similar health benefits as doing the same amount of physical activity spread out throughout the week
Categories: Astronomy