Are Aliens Harvesting the Spin of Stars?

One of the challenges of searching for “technosignatures” (i.e. signs that intelligent life somewhere in the universe has created technology) is understanding what to look for. Technology is a very broad area, and different types would show up as different features. One of the most commonly cited is a Dyson sphere, which attempts to encapsulate a star and capture it’s outgoing light to produce energy. But while we’ve looked for the mid-infrared waste heat these structures would produce for decades, we haven’t found a definitive instance of one. According to a new paper, available in pre-print on arXiv by Turkish high school student Sahin Torlakcik, that might be because we are looking for the wrong type of energy all together.

JWST May Be Missing Water Hidden Deep Within Mini-Neptune Worlds

Sub-Neptune exoplanets, exoplanets that are slightly smaller than Neptune, have been designated as the most common type of planet in the Milky Way Galaxy based on their vast discovery numbers, totaling almost 3,300 out of the more than 6,300 confirmed exoplanets to date. Despite these numbers, the characteristics of sub-Neptunes remain relatively unknown. This is primarily due to our own solar system not having its own sub-Neptune to use as an analog, along with their atmospheres being thick and hazy. As a result, this makes telescopic observations, even from powerful instruments like NASA’s James Webb Space Telescope, extremely difficult.

New Images Reveal the Stunning Properties of the Black Hole at the Center of M87

Researchers from the Shanghai Astronomical Observatory of the Chinese Academy of Sciences, together with international collaborators, carried out the first spatially resolved dual-frequency spectral study of the M87 black hole using observations obtained in 2018 with the Event Horizon Telescope (EHT) and the Global Millimeter VLBI Array (GMVA).

Are We Missing Alien Lighthouses?

Searching for extraterrestrial intelligence has so far meant primarily focusing on one particular type of signal - and that signal has normally been based on what our own current cutting edge technology is. But what if that’s the wrong way to look for signs of an alien intelligence? What if a resource-conscious civilization decided it was too complicated to send femto-second lasers in high energy bursts out across the universe. A new paper, available in pre-print on arXiv, from researchers Dániel Apai, Chia-Lung Lin, and Kevin Wagner, suggest that might actually be what happens, and that we should start looking for long-duration pulsing interstellar beacons.

Juno Measures the Heat Below Io's Restless Surface

Juno's Microwave Radiometer (MWR) was built peer deep down into Jupiter's massive atmosphere. But during the spacecraft's extended mission, it's been studying the Galilean moons. During two flybys of volcanic Io, the spacecraft its MWR to measure the heat flowing from deep within the moon.

Mars Express Captures 'Metallic' Waves Rolling Across an Ancient Martian Crater

When we think of Mars as the “Red Planet”, the image that comes to mind is just that - a lot of red. That comes from the oxidization of the dust and rocks that cover the planet's surface, but there are some instances where the Red Planet still has a few visual tricks up its sleeve. One such trick was recently captured by the European Space Agency’s venerable Mars Express orbiter, which captured what seems to be a set of metallic waves inside a giant impact basin. But on closer inspection, it becomes clear they aren’t liquid metal or some sort of alien architecture, but a manifestation of Mars’ complex environment.

Spin-Reversing Comet May Face Self-Destruction

Comets are known for providing breathtaking observations of their long and shiny tails when they travel too close to the Sun. This happens because comets are made of ice and primarily orbit far from the Sun, but as their icy core heats up it evaporates, resulting in the aforementioned breathtaking observations. But while evaporating comets make for great public photos, scientists who study comets are focused on these snowballs of gas and dust and how they are remnants of the origins of the solar system about 4.6 billion years ago.