Space News & Blog Articles

When the James Webb Space Telescope (JWST) began operations, one of its earliest surveys was of galaxies that existed during the very early Universe. In December 2022, these observations revealed multiple objects that appeared as "Little Red Dots" (LRDs), fueling speculation as to what they might be. While the current consensus is that these objects are compact, early galaxies, there is still debate over their composition and what makes them so red. On the one hand, there is the "stellar-only" hypothesis, which states that LRDs are red because they are packed with stars and dust.

When the Apollo astronauts explored the Moon from 1969 to 1972, they left behind several science experiments designed to measure the Moon's magnetic field, seismic activity, and environment. Each mission also returned with samples of rock and soil (regolith), the analysis of which revealed a wealth of information about the Moon's composition. For instance, the rocks showed that the Earth and Moon had similar structures and compositions, leading to the widely accepted theory that the Moon formed 4.5 billion years ago when a Mars-sized object (Theia) impacted primordial Earth (known as the Giant Impact Hypothesis).

In 2008, NASA's Phoenix Lander generated headlines when its thruster exposed subsurface water ice under its landing spot. It then used its robotic arm to dig beneath the surface, where it exposed more ice. Orbiters like Mars Express and the Mars Reconnaissance Orbiter added additional evidence for subsurface ice with radar and imaging. Now, scientists think that the planet may hold vast amounts of water ice under its surface, enough to potentially cover the entire surface of Mars with 1.5 meters of liquid water.

It is an established scientific fact that most galaxies in the Universe have a supermassive black hole (SMBH) at their center, leading to what is known as an Active Galactic Nucleus (AGN). Also known as "quasars," AGNs are notable for how they emit so much light and radiation that they temporarily outshine all of the stars in their disk. In 2019, scientists with the Event Horizon Telescope (EHT) collaboration produced the very first image of an SMBH, which resides at the center of the M87 galaxy. However, about a century before this historic accomplishment was made, an astronomer detected a powerful jet coming from the center of this very same galaxy.

Use cases for smart materials in space exploration keep cropping up everywhere. They are used in everything from antenna deployments on satellites to rover deformation and reformation. One of the latest ideas is to use them to transform the solar sails that could primarily be used as a propulsion system for a mission into a heat shield when that mission reaches its final destination. A new paper from Joseph Ivarson and Davide Guzzetti, both of Auburn’s Department of Aerospace Engineering, and published in Acta Astronautica, describes how the idea might work and lists some potential applications exploring various parts of the solar system.

Mars is not the most hostile place in our Solar System to life but isn’t somewhere to put on your holiday itinerary just yet. Any organism attempting to survive there would face meteorite impacts, extreme temperature changes, ionising radiation cutting through the thin atmosphere, and highly oxidising salts in the Martian soil that destabilise the molecular bonds holding proteins and cells together. It's a combination of factors that, when taken together would seem insurmountable for most terrestrial life to get a foothold.

Between 4.1 and 3 billion years ago, Mars was volcanically active. Massive eruptions existed across the planet's surface, throwing material and gases high into the thin Martian atmosphere. A new study uses climate modelling to explore whether these events could have transported water ice to unexpected regions of the red planet. The team, led by Saira Hamid from Arizona State University simulated the ancient volcanic eruptions to see what happened to water vapour during each event. The results from their study were quite surprising.

Most white dwarf binaries, where two stellar remnants orbit each other, have spent millions of years cooling down to surface temperatures around 4,000 degrees Kelvin. These ancient objects sit quietly in space, slowly radiating away their residual heat. But astronomers have discovered a peculiar class of these binary systems that seems to defy all expectations. These white dwarfs orbit each other faster than once per hour, and instead of being cool and compact, they're far hotter than expected, reaching surface temperatures between 10,000 and 30,000 degrees Kelvin, and twice the size theory predicts they should be.

The corona of the Sun is an extraordinary place, with temperatures exceeding one million degrees Celsius, far hotter than the Sun's visible surface below. During solar flares, violent releases of magnetic energy, plasma can cool dramatically and condense into dense blobs that plummet back toward the Sun's photosphere, its visible surface. These falling streams of cooler material create the phenomenon of coronal rain. However, existing solar models couldn't explain the speed at which this cooling happens.