Give me a lever long enough and a place to stand and I can move the Earth

— Archimedes 200 BC

Astronomy

The largest Mars rock on Earth is up for auction in NYC — it could be yours for $4 million (or more)

Space.com - Tue, 07/15/2025 - 9:00am
The largest Mars rock on Earth will soon be auctioned off in NYC, and could sell for at least $2 million.
Categories: Astronomy

Complex knots can actually be easier to untie than simple ones

New Scientist Space - Cosmology - Tue, 07/15/2025 - 7:00am
Mathematicians have solved a decades-old problem in knot theory, discovering that linking two knots together can actually produce a knot that is easier to untie – the opposite of what was expected
Categories: Astronomy

Complex knots can actually be easier to untie than simple ones

New Scientist Space - Space Headlines - Tue, 07/15/2025 - 7:00am
Mathematicians have solved a decades-old problem in knot theory, discovering that linking two knots together can actually produce a knot that is easier to untie – the opposite of what was expected
Categories: Astronomy

Doctors Discover New Blood Type—And Only One Person Has It

Scientific American.com - Tue, 07/15/2025 - 7:00am

Newly discovered “Gwada-negative” is the rarest of 48 known blood groups

Categories: Astronomy

Astronomers discover giant alien planet 35 times more massive than Earth hiding in a known star system

Space.com - Tue, 07/15/2025 - 7:00am
"It remains possible that there are other unseen planets in the system. The challenge is finding them!"
Categories: Astronomy

Earth’s Poles Have Shifted because of Water Dams

Scientific American.com - Tue, 07/15/2025 - 6:30am

When large masses of water are moved from one place to another, this changes the shape of Earth and leads to a phenomenon called true polar wander

Categories: Astronomy

Private Ax-4 astronauts splash down aboard SpaceX capsule to conclude ISS mission (video)

Space.com - Tue, 07/15/2025 - 5:50am
The four astronauts of Axiom Space's latest private mission have safely returned to Earth after more that two weeks aboard the International Space Station.
Categories: Astronomy

Water might be even more important for alien life than we thought

New Scientist Space - Cosmology - Tue, 07/15/2025 - 5:00am
Without enough liquid water on the surface, a planet's atmosphere can become choked with carbon dioxide, raising temperatures to a level beyond what is survivable for all known life
Categories: Astronomy

Water might be even more important for alien life than we thought

New Scientist Space - Space Headlines - Tue, 07/15/2025 - 5:00am
Without enough liquid water on the surface, a planet's atmosphere can become choked with carbon dioxide, raising temperatures to a level beyond what is survivable for all known life
Categories: Astronomy

Ignis mission highlights

ESO Top News - Tue, 07/15/2025 - 4:00am

After 20 days in space, ESA project astronaut Sławosz Uznański-Wiśniewski and his Axiom Mission 4 (Ax-4) crewmates returned safely to Earth today, 15 July 2025.

Categories: Astronomy

Climate scientists urge others to take up CO2 tracking as US cuts loom

New Scientist Space - Space Headlines - Tue, 07/15/2025 - 3:00am
Proposed budget cuts in the US will lead to the loss of vital carbon dioxide measurements, but no other countries are preparing to step in so far, researchers warn
Categories: Astronomy

Climate scientists urge others to take up CO2 tracking as US cuts loom

New Scientist Space - Cosmology - Tue, 07/15/2025 - 3:00am
Proposed budget cuts in the US will lead to the loss of vital carbon dioxide measurements, but no other countries are preparing to step in so far, researchers warn
Categories: Astronomy

This is the Closest Picture Ever Taken of the Sun

Universe Today - Mon, 07/14/2025 - 11:00pm

December 24th, 2024, NASA's Parker Solar Probe made its closest approach to the Sun so far, coming within just 6.1 million km from the surface of the Sun. During this flyby, it captured data and images, including this incredible picture using the Wide Field Imager for Solar Probe, or WISPR. In this WISPR image, you can see the corona and solar wind, charged particles coming from the Sun, hurled across the Solar System. The next pass will happen in September.

Categories: Astronomy

Primordial Black Hole Flybys Could Alter Exoplanet Orbits

Universe Today - Mon, 07/14/2025 - 11:00pm

Close encounters with massive objects can alter the orbits of planets around their stars. Stellar flybys can change planetary orbits, and may be responsible for some of the rogue or free-floating planets astronomers have discovered. But stars aren't the only massive objects out there, and new research suggests that primordial black holes may alter the orbits of exoplanets.

Categories: Astronomy

Funding Astrobiology Challenges Can Bring Us Closer To Understanding the Origins of Life

Universe Today - Mon, 07/14/2025 - 11:00pm

Astrobiology can be split into two very distinct fields. There’s the field that astronomers are likely more familiar with, involving large telescopes, exoplanets, and spectroscopic signals that are pored over to debate whether they show signs of life. But there is another camp, collective known as the Origins researchers that focus on developing a scientific understanding of how life originally developed on Earth. A new paper from Cole Mathis at Arizona State and Harrison B. Smith at the Institute of Science in Tokyo suggests a new path forward to tackling those challenges - set them up as competitions and let a hefty prize motivate scientific teams and individuals to pursue them.

Categories: Astronomy

Ancient Rivers in Noachis Terra Reveal Mars' Long-Lived Wet Past

Universe Today - Mon, 07/14/2025 - 11:00pm

In the last couple of decades, evidence has accumulated showing that ancient Mars was a warm planet with abundant water flowing across its surface. The more scientists study the planet, the more evidence they find. New research examining Mars' Noachis Terra region adds to this evidence, showing that flowing water was once widespread across this less-often studied region.

Categories: Astronomy

China launches new spacesuits, other supplies to Tiangong space station (video)

Space.com - Mon, 07/14/2025 - 6:20pm
A Long March 7 rocket lifted off this evening (July 14), sending China's Tianzhou 9 cargo spacecraft toward the Tiangong space station.
Categories: Astronomy

Ravenous 'vampire' stars may use cosmic accomplices to help devour stellar victims

Space.com - Mon, 07/14/2025 - 5:00pm
Astronomers have discovered that vampire white dwarfs that feast on victim companion stars have assistance in acquiring prey in the form of lurking third stars.
Categories: Astronomy

Texas Failed to Spend Federal Aid for Flood Disaster Protection

Scientific American.com - Mon, 07/14/2025 - 4:30pm

Many states, including Texas, have not used billions of dollars from FEMA intended to reduce damage from flooding and other disasters

Categories: Astronomy

Built-in fire extinguishers can prevent battery explosions

New Scientist Space - Cosmology - Mon, 07/14/2025 - 4:00pm
Adding fire-suppressing chemicals into batteries can prevent overheating, fires and explosions, cutting the risks for electric vehicles and portable electronics
Categories: Astronomy