Universe Today

NASA’s New Horizons mission to Pluto has forced astronomers to rewrite their textbooks — but that’s not all: In the latest episode of the Fiction Science podcast, space scientist Les Johnson explains how New Horizons forced him to rewrite "Pluto," the final novel in Ben Bova's Grand Tour series.

Black holes are usually described as having an event horizon and a singularity, but there are alternative models that don't have these bothersome mathematical paradoxes.

So where do we go after years of empty searches for dark matter? We haven’t learned nothing.

How could the principle of “radical mundanity” proposed by the Fermi paradox help explain why humans haven’t found evidence of extraterrestrial technological civilizations (ETCs)? This is what a recently submitted study hopes to address as a lone researcher investigated the prospect for finding ETCs based on this principle. This study has the potential to help scientists and the public better understand why we haven’t identified intelligent life beyond Earth and how we might narrow the search for it.

The Vera Rubin Observatory saw first light in June 2025. Its images from that time are called the Virgo First Look images because they focus on the Virgo Cluster of galaxies. M61 is one of the galaxies in that cluster, and the VRO has detected a stellar stream of stars around the distant spiral galaxy in Rubin's images.

Astronomers from the International Centre of Radio Astronomy Research (ICRAR) in Australia have created a stunning new radio colour image of the Milky Way. By mapping different radio frequencies to RGB colours, the image reveals large-scale astrophysical phenomena and gives researchers a new tool to understand the lifecycle of stars.

What if I told you that while you can’t see dark matter, maybe you can hear it?

We successfully plugged the hole in the ozone layer that was discovered in the 1980s by banning ozone depleting substances such as chlorofluorocarbons (CFCs). But, it seems we might be unintentionally creating another potential atmospheric calamity by using the upper atmosphere to destroy huge constellations of satellites after a very short (i.e. 5 year) lifetime. According to a new paper by Leonard Schulz of the Technical University of Braunschweig and his co-authors, material from satellites that burn up in the atmosphere, especially transition metals, could have unforeseen consequences on atmospheric chemistry - and we’re now the biggest contributor of some of those elements.

Why is it important to know about exoplanets having their atmospheres stripped while orbiting F-type stars? This is what a recent study submitted to The Astronomical Journal hopes to address as an international team of scientists conducted a first-time investigation into atmospheric escape on planets orbiting F-type stars, the latter of which are larger and hotter than our Sun. Atmospheric escape occurs on planets orbiting extremely close to their stars, resulting in the extreme temperature and radiation from the host star slowly stripping away the planet’s atmosphere.

The gas giant’s early growth carved rings in the protoplanetary disk that surrounded our Sun billions of years ago. This process set the architecture for the inner Solar System and prevented Earth from spiraling into the Sun.

New research from Tel Aviv University reveals that the first stars in the Universe formed in binary systems. These stars played a vital role in the evolution of early galaxies, giving rise to black holes and seeding the Universe with the ingredients for life.

A tiny dim satellite galaxy of the Milky Way doesn't have enough stars to hold itself together. Its properties suggest that its dark matter halo is holding it together, but new research counters that. Researchers say that it's not dark matter but a massive black hole that's keeping the dwarf galaxy intact.

Current gravitational wave observatories can't see a range of frequencies known as mid-band. That could change with a new detector that uses a trick from atomic clocks.

As a kid you ever play that game Guess Who? If you haven’t, it’s actually kinda fun.

Lockheed Martin Skunk Works has executed the first test flight of the X-59 quiet supersonic aircraft in partnership with NASA. The first flight was subsonic, but eventually the plane will demonstrate technologies aimed at reducing sonic booms to gentle thumps.

Black holes are eating each other and growing fat on the remains! They then seem to move on, finding new partners to devour in what can only be described as a cycle of violence. Two gravitational wave detections from late 2024 have caught these “second generation" black holes in the act, one spinning so fast it ranks among the most extreme ever observed, the other rotating backwards. These aren't simple collisions between black holes born from dying stars, instead they're the products of earlier mergers now colliding again in crowded stellar neighbourhoods, carrying the scars and strange spins of their violent pasts into the fabric of spacetime itself.

A giant spider sprawls across space, its three light year legs stretching into the cosmos powered by a star in its death throes. The James Webb Space Telescope has captured the Red Spider Nebula in stunning new detail, revealing not just the spectacular structure of a dying Sun like star, but also hints of a hidden companion influencing the show. What appeared faint and unremarkable in previous observations now blazes with infrared light, exposing hot dust shrouding the central star and fast moving jets of ionized iron creating ripples through expelled stellar material.

I tour a science show around the UK and have often fancied a flame thrower based demo, theatres are not so keen though. Imagine the Sun as a flamethrower in its youth, hurling solar storms and plasma bombs into space with incredible ferocity. Scientists have just witnessed what those ancient events might look like by observing a young star similar to our infant Sun, and the findings are both alarming and fascinating. Using observations from the Hubble Space Telescope and ground observatories across three countries, researchers captured a two stage plasma eruption far more powerful than anything we see from the modern Sun, the kind of violence that may have either destroyed early life on Earth or surprisingly made it possible in the first place.

The Habitable Worlds Observatory (HWO) is slated to be the next Great Observatory for the world. Its main focus has been searching for biosignatures in the atmospheres of at least 25 Earth-like exoplanets. However, to do that, it will require a significant amount of effort with only a coronagraph, the currently planned primary instrument, no matter how powerful that coronagraph is. As new paper from Fabien Malbet of the University of Grenoble Alpes and his co-authors suggest an improvement - add a second instrument to HWO’s payload that will be able to astrometrically track planets down to a precision of .5 micro-arcseconds (µas). That would allow HWO to detect Earth-size planets around hundreds of nearby stars - dramatically increasing the number of potential candidates for atmospheric analysis.

Can water-rich exoplanets survive orbiting white dwarf stars, the latter of which are remnants of Sun-like stars? This is what a recent study accepted to The Astrophysical Journal hopes to address as a team of researchers investigated the likelihood of small, rocky worlds with close orbits to white dwarfs could harbor life. This study has the potential to help scientists better understand the conditions for finding life as we know it, or don’t know it, and where to find it.