A Japanese space probe performed a flyby of a near-Earth asteroid on Sunday in a test mission for technology that could help protect the planet from space rocks.
The fridge-sized Hayabusa2 was due to fly within 800 meters (0.5 miles) of asteroid Torifune, Japan Aerospace Exploration Agency (JAXA) scientists said earlier, a trial run to see whether such a probe could deflect a potentially dangerous space rock away from Earth.
The mission comes after NASA deliberately smashed a spacecraft into the 160-meter-wide (525-foot-wide) Dimorphos asteroid in 2022, successfully altering its orbit around a larger space rock.
Astronomers have only previously found atmospheres around exoplanets that are very large or incredibly hot – but now they have found one adorning a world that may well be right for life
As far as we know, food doesn’t exist naturally in space. We have to bring it with us if we want to explore the final frontier. One of the oldest and most common types of food on planet Earth is seafood, yet we know surprisingly little about how aquatic animals would react to the microgravity environment they would experience in space. A new paper by researchers at Japan’s Okayama University of Science, which was recently published in Microgravity Science and Technology, hopes to tackle that question. It used a novel way to simulate microgravity to watch how crustaceans would react to the space environment, and found that they could likely be good candidates as part of a future space food chain.
Most microgravity experiments on Earth take place in drop chambers or parabolic flights — both of which only offer a few seconds of true “microgravity”, and aren’t suitable for longer duration testing. The International Space Station offers an alternative, but is extremely expensive and has very limited space to run additional experiments. So the researchers turned to an alternative tool — the clinostat.
These specialized chambers rapidly change the orientation their contents are subjected to, varying the gravity field they experience and mimicking at least some of the effects of microgravity. They rotate in such a way that the combination of gravity and centrifugal force will eventually come out to essentially zero over a period of time. These machines work well for single-celled organisms and plants. But they’re not as effective for complex animals.
Saturn’s largest moon runs a full hydrological cycle — clouds, storms, rivers, lakes, seas — but the rain is liquid methane and the bedrock is water ice frozen to about minus 179 Celsius, hard enough to build mountains from.
Astronomers using NASA’s James Webb Space Telescope have discovered a giant planet outside our solar system, called an exoplanet, hiding within one of the most intensely studied planetary systems in the Milky Way galaxy.
The young, nearby star Beta Pictoris was already known to host two giant planets: Beta Pictoris b, one of the first exoplanets ever directly imaged, and Beta Pictoris c. The newly identified Beta Pictoris d makes it only the second planetary system known to contain at least three imaged planets.
Unlike Beta Pictoris b and c, however, Beta Pictoris d was discovered not by identifying a bright point of light but by detecting the unique chemical fingerprint of its atmosphere, a technique that could transform the search for worlds around other stars.
A monosaccharide sugar has been detected in an interstellar cloud: the chiral ketose erythrulose. Observations and chemical modelling show that it forms efficiently on dust grains, supporting an interstellar origin for prebiotic sugars linked to early life.
In the last year or so, artificial intelligence companies have rolled out a spate of web browsers equipped with AI agents. A user might ask one of these agents to plan a vacation, and it will open browser tabs to research routes and restaurants, then make reservations and add events to the user’s calendar. How well it does any of this varies.
New research from the University of Washington found that the most powerful of these browsers also open users up to significant cybersecurity risks. A UW team studied seven popular agentic browsers and found that four create ways for malicious actors to bypass a fundamental cybersecurity protocol called the “same-origin policy,” which makes websites that are open in a browser unable to interact with each other’s information.
Researchers ran a successful proof-of-concept cyberattack on one browser, ChatGPT Atlas. They had a website steal information from another site embedded within it—as if an ad on an email site could snatch sensitive information from the user’s emails. Researchers also found the right conditions for similar attacks in three other browsers: Chrome with Gemini, Claude for Chrome and Perplexity Comet. The browsers that gave agents fewer permissions were generally safer.
University of Arizona researchers have demonstrated a promising new application for graphene nanoribbons, a nanoscale semiconductor material with the potential to withstand extreme environments. The team’s findings could help clear a key hurdle to bringing fusion energy to the electric grid.
For the proof-of-concept study, published in the journal ACS Applied Materials & Interfaces, the researchers integrated the nanoribbons, known as GNRs, into semiconductor devices and exposed them to gamma radiation. Their results suggest that the ribbons could serve as radiation sensors for fusion reactors and in deep space, where intense radiation challenges existing technologies and close monitoring of material degradation could help keep critical systems operating reliably.
“The devices survive the exposure and still respond, but their electrical performance changes dramatically,” said principal investigator Zafer Mutlu, an assistant professor of materials science and engineering at the University of Arizona College of Engineering. “That’s exactly the behavior we want from a sensor.”
