The Milky Way can’t hold onto all of its stars. Some of them get ejected into intergalactic space and spend their lives on an uncertain journey. A team of astronomers took a closer look at the most massive of these runaway stars to see what they could find out how they get ejected.
Lucy’s images of asteroid Dinkinesh are the gift that keeps on giving. First, it was the discovery of a smaller companion. Now, it turns out that the companion itself is a contact binary. That’s two smaller objects touching each other as they orbit with Dinkinesh. So, how did they get that way?
Einstein’s fascination with light, considered quirky at the time, would lead him down the path to a brand new theory of physics.
What can slime molds tell us about the large-scale structure of the Universe and the evolution of galaxies? These things might seem incongruous, yet both are part of nature, and Earthly slime molds seem to have something to tell us about the Universe itself. Vast filaments of gas threading their way through the Universe have a lot in common with slime molds and their tubular networks.
A recent study published in Frontiers in Physiology examines how vibrating wearable devices, known as vibrotactors, can be used to help astronauts cope with spatial disorientation when in space, which results from the lack of gravitational cues, or natural sensory perceptions, they are accustomed to using when on Earth and despite the rigorous training the astronauts undergo to combat the symptoms of spatial disorientation. This study was conducted by a team of researchers at Brandeis University and holds the potential to help develop more efficient methods to combat spatial disorientation, especially with long-term missions to the Moon, and even Mars.
Not to make anyone feel old, but it’s been over 11 years since NASA’s Curiosity Rover landed on Mars. The rover has now seen the sun rise on Mars over 4,000 times. During this time, the rover has driven almost 32 kilometers on Mars, making its way up the flanks of Mount Sharp while studying the ancient history of water on Mars.
A supernova explosion is a cataclysmic explosion that marks the violent end of a massive star’s life. During the event, the star releases immense amounts of energy, often outshining the combined light from all the stars in the host galaxy for a very brief period of time. The explosion produces heavy elements and spreads them out among the stars to contribute to the formation of new stars and planets. The closest supernova in recent years occurred in the Large Magellanic Cloud in 1987 (SN1987A) and now, a team of astronomers have searched through mountains of data to see if they can detect gravitational waves from the remnant.
Saturn’s ocean moon, Enceladus, is attracting increasing attention in the search for life in our Solar System. Most of what we know about Enceladus and its ice-covered ocean comes from the Cassini mission. Cassini ended its exploration of the Saturn system in 2017, but scientists are still working through its data.
Landing safely on an asteroid is no mean feat. Despite several recent successes, there have also been notable failures – most famously, the Philae lander to 67P/Churyumov-Gerasimenko. Admittedly, that was an attempt to land on a comet rather than an asteroid, but those two bodies share many of the same landing hazards. One of the most prevalent of those is “inhomogenous” gravity. To tackle this problem, researchers from the Harbin Institute of Technology in China recently released a paper detailing a framework for performing “soft landings” on asteroids, which might help make exploring these rocky worlds much more accessible.
The Indian space program has been on a bit of a tear lately. Chadrayaan-3 was just the latest successful for the ISRO, India’s space agency, when it launched in July – especially juxtaposed with Luna-25, a Russian moon lander mission that launched around the same time and failed spectacularly by crashing into the Moon. Maybe in part due to the ISRO’s success, Indian Prime Minister Narendra Modi appears to have taken an increased interest in the program and recently chaired a meeting to review the Gaganyaan Mission, India’s first foray into crewed space flight. But while in the meeting, he suggested the country’s exploration goals should go further – much further.
An old refractor telescope sees a second life under the night skies, thanks to the efforts of a dedicated amateur observer.
Elon Musk and Jeff Bezos may harbor multibillion-dollar dreams of sending millions of people to live on Mars, on the moon and inside free-flying space habitats — but a newly published book provides a prudent piece of advice: Don’t go too boldly.
I know for a fact it’s one of the most annoying things that can happen. I’ve done it lots; whether that be out at night with telescope or a bit of DIY but for sure it has to rate as one of the most frustrating things to happen. I am talking of dropping something you are using. Ranking high is dropping tools while you are actually using them.. Dropping a tool is one thing but imagine dropping an entire bag of tools, while in orbit!!!! Oops!
We live in an age of exoplanet discovery. One thing we’ve learned is not to be surprised by the kinds of exoplanets we keep discovering. We’ve discovered planets where it might rain glass or even iron, planets that are the rocky core remnants of gas giants stripped of their atmospheres, and drifting rogue planets untethered to any star.
NASA’s Juno mission continues to orbit Jupiter, gathering data on its atmosphere, composition, gravitational field, magnetic field, and radiation environment. This data is helping scientists to learn more about the planet’s formation, internal structure, mass distribution, and what is driving its powerful winds. Periodically, the spacecraft also performs flybys of Jupiter’s largest satellites (the Galilean Moons), acquiring stunning images and vital data on their surfaces. These include optical and thermal images of Io’s many active volcanoes, Europa’s icy terrain, and infrared images of Ganymede.
A study published today in The Planetary Science Journal examines how NASA’s James Webb Space Telescope (JWST) has conducted a first-time detection of carbon dioxide in a Centaur, this one designated 39P/Oterma. A Centaur is a small planetary body that orbits between Jupiter and Neptune and frequently crosses the orbits of one or more of the gas giant planets within our solar system. While no Centaur has been imaged up-close, they typically exhibit a combination of attributes between comets and asteroids. While carbon monoxide has been detected in two known centaurs, this recent discovery could mark a turning point in how scientists understand the formation, evolution, and composition of not only Centaurs, but of the early solar system, as well.
When the Universe erupted into existence with the Big Bang, all of its matter was compressed into a tiny area. Cosmologists theorize that in some regions, subatomic matter may have been so tightly packed that matter collapsed into primordial black holes. If these primordial black holes exist, they’re small, and they could be hiding among the population of free-floating planets.
Since it became operational almost two years ago, the James Webb Space Telescope (JWST) has produced countless breathtaking images of the Universe and enabled fresh insights into how it evolved. In particular, the telescope’s instruments are optimized for studying the cosmological epoch known as Cosmic Dawn, ca. 50 million to one billion years after the Big Bang when the first stars, black holes, and galaxies in the Universe formed. However, astronomers are also getting a better look at the epoch that followed, Cosmic Noon, which lasted from 2 to 3 billion years after the Big Bang.
It’s a sobering statement that stars like the Sun, more accurately ALL stars will die eventually, yes even the Sun! Don’t panic though, we still have a good few billion years to go so you will get to the end of this article. The more massive stars die as the dramatic supernovae explosions and when they do, they send a burst of neutrinos across the Universe. Astronomers now think it’s likely there is a background of neutrinos across the cosmos and that one day we will be able to map the historical distribution of supernova explosions, may be even by 2035.
In 1916, famed theoretical physicist Albert Einstein put the finishing touches on his Theory of General Relativity, a geometric theory for how gravity alters the curvature of spacetime. The revolutionary theory remains foundational to our models of how the Universe formed and evolved. One of the many things GR predicted was what is known as gravitational lenses, where objects with massive gravitational fields will distort and magnify light coming from more distant objects. Astronomers have used lenses to conduct deep-field observations and see farther into space.
Last September, NASA purposefully smashed a spacecraft into Dimorphos, a 160m-wide space rock orbiting a larger asteroid named Didymos. The goal of the mission, called DART (the Double Asteroid Redirection Test), was to demonstrate humanity’s ability to redirect hazardous asteroids away from Earth. That part of the mission was a success above and beyond all expectations. But now scientists are also learning more about the origins of the two asteroids. A study conducted in the wake of the DART impact found that Dimorphos is made from the same material as Didymos, and that the pair of asteroids likely originated from a single body.
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