Mark Thompson, Author at Universe Today

January 27, 2025January 27, 2025 by Mark Thompson

Ingenuity Measured Windspeeds on Mars During its Flights

This view of NASA’s Ingenuity Mars Helicopter was generated using data collected by the Mastcam-Z instrument aboard the agency’s Perseverance Mars rover on Aug. 2, 2023, the 871st Martian day, or sol, of the mission, one day before the rotorcraft’s 54... Credit: NASA/JPL-Caltech/ASU/MSSS

One of my gripes with ‘The Martian’ movie was the depiction of the winds on Mars. The lower air density means that the sort of high speed winds we might experience on Earth carry far less of an impact on Mars. During its 72 flights in the Martian air, NASA’s ingenuity helicopter took meticulous records of the conditions. A new paper has been released and reports upon the wind speeds on the red planet at various altitudes. Previous models suggested wind speeds would not exceed 15 m/s but Ingeniuty saw speeds as high as 25 m/s.

January 26, 2025January 26, 2025 by Mark Thompson

Researchers Practice Searching for Life on Enceladus, in the Arctic Ocean

When searching for alien life, it’s not unusual to use Earth as a test bed for theories and even practice runs. Perhaps one of the most tantalising places in the Solar System to look for life is Saturn’s moon Enceladus. It has a liquid water interior and it is here that life may just be possible. A team of researchers want to test techniques for searching for life on Enceledaus by exploring the oceans of Earth. They have collected water and ice samples and hope to find chemicals like methane and hydrogen.

January 25, 2025January 25, 2025 by Mark Thompson

There’s More Than Just Gravity at Work in the Solar System

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our Solar System has been well known. It’s responsible for the orbits of the planets and their satellites but there are other forces that have shaped our planetary neighbourhood. A new paper has been released where an astronomer discusses how recoiling ice from comets can push them around and how the radiation pressure from the Sun drives material outwards. There are also relativistic effects too that can cause particles to spiral inward toward the Sun.

January 25, 2025January 25, 2025 by Mark Thompson

There are Places on Earth Which Could Have Life, but Don’t. What Can We Learn?

Don’t know about you but when I think of Earth my mind is filled with the diversity of life and the rich flora and fauna. In reality, about 99% of Earth is uninhabitable; deep underground places with high pressure and temperature where even the toughest bacteria cannot survive. There are places though where life thrives from tiniest toughest bacteria to the largest elephant. Then there are places that are habitable but devoid of life; lava flows are a great example and the space between microbes. A paper recently released looks at these uninhabited, habitable areas and wonders what we may learn as we search for life in the Universe.

January 24, 2025January 24, 2025 by Mark Thompson

NASA is Testing Shape Memory Alloy Wheels

A test rover with shape memory alloy spring tires traverses rocky, Martian-simulated terrain. Credit: NASA

Rovers on alien worlds need to be built of strong stuff. The dry rugged terrain can be punishing on the wheels as they explore the surface. In order to prevent the damage to the wheels, NASA is testing a shape memory alloy material that can return to its original shape after being bent, stretched, heated or cooled. NASA has already used this material for years but never in tires, in what may be its perfect application.

January 24, 2025January 24, 2025 by Mark Thompson

Astronomers Release a Huge Survey of Exocomet Belts

All 74 exocomet belts, as imaged in this study. Image: Prof. Luca Matrà.

The study of exoplanets is challenging enough with the immense distances and glare from the host start but astronomers have taken planetary system explorations to the next level. A team of astronomers have recently announced that they have observed belts of icy pebbles in systems with exoplanets. Using a radio telescope they have been able to detect wavelengths of radiation emitted by millimeter-sized pebbles created by exocomet collisions! Based upon this survey, they have found that about 20% of planetary systems contain these exocometary belts.

January 23, 2025January 23, 2025 by Mark Thompson

Life Would Struggle to Survive Near Wolf 359

Red dwarfs always make me think of the classic British TV science comedy show in the 90’s that was named after them. The stars themselves better little resemblance to the show though. They are small, not surprisingly red stars that can generate flares and coronal mass ejections that rival many of the much larger stars. A team of astronomers have recently used the Chandra X-Ray Observatory to study Wolf 359 and found it unleashes brutal X-ray flares that would be extremely damaging to life on nearby planets.

January 23, 2025January 23, 2025 by Mark Thompson

Rubin Will Find Millions of Supernovae

This illustration depicts NSF–DOE Vera C. Rubin Observatory capturing light from supernovae, the explosive deaths of massive stars. These cosmic beacons are important for studying the expansion of the Universe. In particular, Type Ia supernovae serve as “standard candles” to measure cosmic distances. By observing thousands of supernovae across vast regions of the sky, Rubin Observatory’s Legacy Survey of Space and Time (LSST) will provide the largest sample of Type Ia supernovae yet, helping scientists refine the Universe's expansion rate and gain deeper insights into the mysterious “dark energy” driving its acceleration.

The discovery of a few thousand type 1a supernovae over the last few decades has helped measure the expansion of the Universe. The new Vera Rubin Observatory will soon to start scour the skies looking for more. Astronomers hope that the discovery and observations of millions more exploding stars will allow the universal expansion to be mapped in unprecedented detail. If all goes to plan, the survey will begin in a few months with the entire southern sky being scanned every few nights.

January 22, 2025January 22, 2025 by Mark Thompson

Hot Jupiters Can Co-Exist with Other Planets

The WASP-132 system was know to harbour WASP-132b, here in the foreground, a hot Jupiter planet orbiting around a K-type star in 7.1 days. New data confirms the system has more planets, including an inner super-Earth, here seen transiting in front of the orange host-star. Visible as a pale blue dot near the top right corner is also the giant planet WASP-132d discovered in the outskirts of the system.

Exoplanets come in a variety of forms and one particular type, the Hot Jupiters have recently captured the attention of astronomers. They are usually found orbiting extremely close to their host star, completing an orbit in a few days or even hours. It has been thought that they migrated further out from the star, bullying other planets out of their way. Sometimes hurling them into the star or throwing them out of the system entirely. A new study however, suggests their evolution is not quite so violent since a Hot Jupiter has been found in a system with a Super-Earth and an icy giant.

January 22, 2025January 22, 2025 by Mark Thompson

Two Lunar Landers are Off to the Moon

Creating a golden streak in the night sky, a SpaceX Falcon 9 rocket carrying Firefly Aerospace’s Blue Ghost Mission One lander soars upward after liftoff from Launch Complex 39A at NASA’s Kennedy Space Center in Florida on Wednesday, Jan. 15, as part of NASA’s CLPS (Commercial Lunar Payload Services) initiative. The Blue Ghost lander will carry 10 NASA science and technology instruments to the lunar surface to further understand the Moon and help prepare for future human missions. Credit: NASA/Frank Michaux

Back in the 60’s and 70’s it was all about the Moon. The Apollo program took human beings to the Moon for the first time and now over 50 years later things are really hotting up again. The latest mission to head toward our celestial neighbour is a SpaceX Falcon 9 rocket launching Blue Ghost Mission 1 and the HAKUTO-R lander. The Blue Ghost is part of NASA’s Commercial Lunar Payload Services (CLPS) and it carries a total of 10 NASA payloads, the other is a private Japanese enterprise to explore the Moon. The launch went well and both landers will arrive shortly.