Space News & Blog Articles

Conditions on Venus’ surface have largely remained a mystery for decades. Carl Sagan famously pointed out that people were quick to jump to conclusions, such as that there are dinosaurs living there, from scant little evidence collected from the planet. But just because we have little actual data doesn’t mean we can’t draw conclusions, and better yet models, from the data we do have. A new paper from Maxence Lefèvre of the Sorbonne and his colleagues takes what little data has been collected from Venus’ surface and uses it to valid a model of what the wind and dust conditions down there would be like - all for the sake of making the work of the next round of Venusian explorer easier.

Astronomy would be a lot easier if there were no clouds of gas and dust in space. There'd be no need for telescopes with the abilty to see through these thick veils. Alas, space is not only full of things we want to see, but full of things that get in the way.

Exoplanet scientists are eagerly awaiting the discovery of an atmosphere around a terrestrial exoplanet. Not a thin, tenuous, barely perceptible collection of molecules, but a thick, robust, potentially life-supporting atmosphere. Due to the way we detect exoplanets, most of the terrestrial planets we find are orbiting red dwarfs (M dwarfs).

In 1949, famed mathematician and physicist John von Neumann delivered a series of addresses at the University of Illinois, where he introduced the concept of "universal constructor." The theory was further detailed in the 1966 book, Theory of Self-Reproducing Automata, a collection of von Neumann's writings compiled and completed by a colleague after his death. In the years that followed, scientists engaged in the Search for Extraterrestrial Intelligence (SETI) considered how advanced civilizations could rely on self-replicating probes to explore the galaxy.

At the heart of the Milky Way, just 27,000 light-years from Earth, there is a supermassive black hole with a mass of more than 4 million Suns. Nearly all galaxies contain a supermassive black hole, and many of them are much more massive. The black hole in the elliptical galaxy M87 has a mass of 6.5 billion Suns. The largest black holes are more than 40 billion solar masses. We know these monsters lurk in the cosmos, but how did they form?

Sometimes space exploration doesn’t go as planned. But even in failure, engineers can learn, adapt, and try again. One of the best ways to do that is to share the learning, and allow others to reproduce the work that might not have succeeded, allowing them to try again. A group from MIT’s Space Enabled Research Group, part of its Media Lab, recently released a paper in Space Science Reviews that describes the design and testing results of a pair of passive sensors sent to the Moon on the ill-fated Rashid-1 rover.

When it comes to finding baby, still-forming planets around young stars, the Atacama Large Millimeter/submillimeter Array (ALMA) observatory is astronomers' most adept tool. ALMA has delivered many images of the protoplanetary disks around young stars, with gaps and rings carved in them by young planets. In new research, a team of researchers used ALMA to image 16 disks around young class 0/1 protostars and found that planets may start forming sooner than previously thought.

Brown dwarfs are a growing area of focus for astronomers, thanks to improved instruments that have the necessary resolution to visualize them. The term describes substellar objects that are about 13 to 80 Jupiter masses, making them too small to become stars, but massive enough to experience some nuclear fusion in their cores and produce heat. Initially theorized in the 1960s, it was not until the mid-1990s that this class of stellar object was confirmed through direct observation. And thanks to next-generation telescopes and improved data-sharing techniques, there are growing opportunities to study these objects.

Is there anything more dramatic than an exploding star? More than just extraordinarily bright, energetic events that can light up the sky for months, these explosions play important roles in the cosmos. Supernova create heavy elements and spread them out into their surroundings, where they can be taken up in the next round of planet and star formation.

The cosmic voids of the universe are empty of matter. But we all know there’s more to the universe than just matter. Nothing in this universe is completely empty, and that’s because there’s always your constant companions. Me? No, not me, I only visit once a month.

Star formation has a lot of complex physics that feed into it. Classical models used something equivalent to a “collapse” of a cloud of gas by gravity, with a star being birthed in the middle. More modern understandings show a feature called a “streamer”, which funnels gas and dust to proto-stars from the surrounding disc of material. But our understanding of those streamers is still in its early stages, like the stars they are forming. So a new paper published in Astrophysical Journal Letters by Pablo Cortes of the National Radio Astronomy Observatory (NRAO) and his co-authors is a welcome addition to the literature - and it shows a unique feature of the process for the first time.

A few days ago, I wrote about non-singular black hole models, specifically one known as the Hayward model. Since its introduction in 2006, several variations of the Hayward model have been introduced, including a rotating model similar to the Kerr metric used to study the supermassive black holes we've observed directly. This raises an interesting question: what if we use a rotating Hayward model instead of the usual Kerr model? A recent study answers that question.

Now that we have tools to find vast numbers of voids in the universe, we can finally ask…well, if we crack em open, what do we find inside?

When the Sun reaches the end of its main sequence, approximately 5 billion years from now, it will enter what is known as its Red Giant Branch (RGB) phase, during which it will expand and potentially consume Mercury, Venus, and possibly Earth. Not long after, it will undergo gravitational collapse and blow off its outer layers, leaving behind a dense remnant known as a white dwarf. While this is how planet Earth will eventually meet its end, it will not mark the end of the Solar System, as the white dwarf remnant of our Sun surrounded by clouds of trace elements.

Meteorites are both the messengers and time capsules of the Solar System. As pieces of larger asteroids that broke apart, or debris thrown up by impacts on other bodies, these "space rocks" retain the composition of where they originated from. As a result, scientists can study other planets, moons, and objects by examining the abundance of chemical elements in meteorites. Unfortunately, such studies are limited when it comes to meteorites retrieved on Earth, due to erosion, atmospheric filtration, and geological processes (like volcanism and mantle convection).

To answer that question of what’s inside a void, we have to first decide what a void…is. I know it’s easy enough to describe in big, broad, vague terms. Voids are the empty places. Voids are the things that aren’t. If you zoom out to truly enormous scales, well beyond the sizes of mere galaxies, where you take such a huge portrait of the universe that individual galaxies appear as nothing more than tiny points of light, then a) welcome to cosmology, and b) holy crap the voids really stand out. In fact, we got our first taste of voids all the way back in the late 1970’s, right when we started to build our first deep surveys of the universe. Once we started making maps, we noticed places where the maps were empty. And two different groups found the voids around the same time, although only one group called them voids. The other group called them “big holes” for one I’m glad they didn’t win that particular jargon war.

When you open your fridge, you expect it to be cooler than your kitchen. Similarly, when astronomers look back billions of years into the universe's history, they expect to find it was hotter than today. A team of Japanese researchers has just confirmed this prediction with remarkable precision, offering one of the strongest tests yet of our understanding of how the universe evolved.

Comet 3I/ATLAS, only the third known visitor from beyond our Solar System, has been brightening far more rapidly than expected as it approaches perihelion, its closest point to the Sun. From Earth, the comet has been positioned almost directly behind the Sun for the past month, making ground based observations nearly impossible during this crucial period. Instead, the team of astronomers have been watching from space based observatories.

Space clouds, or nebulae as they are more properly known are vast nurseries where stars are born from swirling collections of gas and dust scattered throughout a galaxy. These aren't fluffy white clouds like the ones we see in the sky, they're enormous regions stretching light years across, filled with hydrogen, helium, and trace amounts of heavier elements left over from previous generations of stars. Some glow brilliantly with vibrant colours as nearby stars illuminate them, while others appear as dark silhouettes blocking the light of stars behind them. Inside these clouds, gravity slowly pulls matter together over millions of years, creating dense pockets that eventually collapse to form new stars and planetary systems.

For decades, astronomers have studied Jupiter’s Great Red Spot and swirling cloud bands through increasingly powerful telescopes, building a detailed understanding of our giant neighbor’s dynamic atmosphere. Now, for the first time, scientists have created a three-dimensional map of a planet orbiting a distant star, a breakthrough that promises to transform how we study worlds beyond our Solar System.

For over a century, rocket propulsion has followed a simple principle; burn fuel, expel it backward, and Newton’s third law pushes you forward. Since Konstantin Tsiolkovsky first formulated the rocket equation in 1903, spacecraft have carried their propellant with them, limiting mission capabilities by the mass ratios. The more fuel you carry, the heavier your rocket becomes, requiring even more fuel to lift that fuel, in a vicious cycle that makes interstellar travel seem impossibly distant. But what if spacecraft didn’t need to carry propellant at all?