Following the light of the sun, we left the Old World.

— Inscription on Columbus' caravels

Astronomy

Thousands of seadragons are dying in Australia's toxic algal bloom

New Scientist Space - Cosmology - Thu, 07/24/2025 - 11:00am
An algal bloom in South Australia has caused mass deaths of many species since March - now researchers warn that leafy and weedy seadragons could be facing the threat of extinction
Categories: Astronomy

Astronomers calculate that the universe will die in 33 billion years — much sooner than we thought

Space.com - Thu, 07/24/2025 - 11:00am
The theorists predict that the beginning of the end will be in about 10 billion years — less than the present age of the universe.
Categories: Astronomy

New moon of July 2025 sees Saturn swim with the fishes tonight

Space.com - Thu, 07/24/2025 - 10:00am
Saturn will be quite distinct in the Pisces constellation.
Categories: Astronomy

Gravitational Wave Science Faces Budget Cuts Despite A First Decade of Breakthroughs

Scientific American.com - Thu, 07/24/2025 - 10:00am

Less than a decade since the first detection of gravitational waves—ripples in spacetime itself—proposed budget cuts threaten to silence this groundbreaking science

Categories: Astronomy

Polymetallic Nodules, a Source of Rare Metals, May Hold the Secrets of ‘Dark Oxygen’

Scientific American.com - Thu, 07/24/2025 - 10:00am

When researchers discovered evidence of “dark oxygen” last year, the news spread around the world, but the biggest challenge to the science comes from its funders

Categories: Astronomy

Our brain's mitochondria may play a crucial role in the onset of sleep

New Scientist Space - Cosmology - Thu, 07/24/2025 - 9:00am
Textbooks say that mitochondria exist to supply cells with energy, but experiments in fruit flies suggest they are also involved in sleep
Categories: Astronomy

Our brain's mitochondria may play a crucial role in the onset of sleep

New Scientist Space - Space Headlines - Thu, 07/24/2025 - 9:00am
Textbooks say that mitochondria exist to supply cells with energy, but experiments in fruit flies suggest they are also involved in sleep
Categories: Astronomy

'Here today, Gorn tomorrow:' Showrunners talk putting a classic alien adversary to rest in 'Star Trek: Strange New Worlds' (exclusive)

Space.com - Thu, 07/24/2025 - 9:00am
'Here today, Gorn tomorrow. I think it's now time for other scary things to take their place.'
Categories: Astronomy

New fiber optic telescope 4MOST channels 'The Fantastic Four' | Space photo of the day for July 24, 2025

Space.com - Thu, 07/24/2025 - 8:00am
Marvel's new superhero movie isn't the only thing featuring some of the brightest stars.
Categories: Astronomy

Largest-ever supernova catalog ever provides further evidence dark energy is weakening

Space.com - Thu, 07/24/2025 - 6:00am
A catalog of over 2,000 exploding white dwarf vampire stars, the largest ever gathered, has provided further evidence that dark energy is weakening.
Categories: Astronomy

First MetOp Second Generation satellite fuelled

ESO Top News - Thu, 07/24/2025 - 4:56am

The journey to launch is picking up pace for Europe’s MetOp Second Generation weather satellite – which hosts the Copernicus Sentinel-5 as part of its instrument package. Specialists at Europe’s Spaceport in Kourou have completed the critical and hazardous task of fuelling the satellite, marking a major milestone in its final preparations for liftoff.

Categories: Astronomy

The time you take an oral exam could affect whether you pass or fail

New Scientist Space - Cosmology - Thu, 07/24/2025 - 1:00am
Midday seems to be the optimal time to take an oral exam at university, which could be due to students not generally being early risers
Categories: Astronomy

The time you take an oral exam could affect whether you pass or fail

New Scientist Space - Space Headlines - Thu, 07/24/2025 - 1:00am
Midday seems to be the optimal time to take an oral exam at university, which could be due to students not generally being early risers
Categories: Astronomy

<p><a href="https://apod.nasa.gov/apod

APOD - Thu, 07/24/2025 - 12:00am


Categories: Astronomy, NASA

<p><a href="https://apod.nasa.gov/apod

APOD - Thu, 07/24/2025 - 12:00am


Categories: Astronomy, NASA

Betelgeuse Isn't Alone. It Has A Very Dim Companion

Universe Today - Wed, 07/23/2025 - 10:04pm

Astronomers have discovered a companion star in an incredibly tight orbit around Betelgeuse using the NASA and U.S. National Science Foundation-funded ‘Alopeke' instrument on Gemini North, one half of the International Gemini Observatory, partly funded by the NSF and operated by NSF NOIRLab. This discovery answers the longstanding mystery of the star’s varying brightness and provides insight into the physical mechanisms behind other variable red supergiants.

Categories: Astronomy

New Horizons Could Find Its Way to Proxima Centauri if it Wanted

Universe Today - Wed, 07/23/2025 - 10:04pm

The New Horizons spacecraft is humanity's fastest-moving spacecraft and headed to interstellar space. Since its exploration of Pluto 10 years ago and subsequent flyby of Arrokoth in 2019, it's been traversing and studying the Kuiper Belt while looking for other flyby objects. That's not all it's been doing, however. New Horizons also has an extended program of making heliophysics observations. The mission science team has also planned astrophysical studies with the spacecraft's instruments. Those include measuring the intensity of the cosmic optical background and taking images of stars such as Proxima Centauri. As the spacecraft moves, the apparent positions of its stellar navigation targets have changed, but that hasn't bothered New Horizons one bit. It knows exactly where it is thanks to 3D observations of those nearby stars.

Categories: Astronomy

Are the JWST's Little Red Dots Actually Supermassive Black Hole Seeds?

Universe Today - Wed, 07/23/2025 - 10:04pm

What are the JWST's Little Red Dots? While they appear to be galaxies, there's no observational certainty. New research examines the idea that they're actually stars, suggesting that they're actually the progenitors for supermassive black holes.

Categories: Astronomy

How To Detect Magnetic Fields Around Exoplanets

Universe Today - Wed, 07/23/2025 - 10:04pm

Magnetic fields play an important, if sometimes underappreciated, part in planetary systems. Without a strong magnetic field, planets can end up as a barren wasteland like Mars, or they could indirectly affect massive storms as can be seen on Jupiter. However, our understanding of planetary magnetic fields are limited to the eight planets in our solar system, as we haven’t yet accrued much data on the magnetic fields of exoplanets. That could be about to change, according to a new preprint paper by a group of research scientists from Europe, the US, India and the UAE.

Categories: Astronomy

Scientists are Planning for Life After Finding Aliens

Universe Today - Wed, 07/23/2025 - 10:04pm

Just imagine it, the news stories are all over your phone when you wake! The day will surely come that we will discover that we are not alone in the Universe! What happens the day after though? A new research paper from the SETI Post Detection Hub at the University of St Andrews tackles this question, outlining how NASA and the global scientific community should prepare for the moment humanity detects signs of extraterrestrial intelligence.

Categories: Astronomy