Mark Thompson, Author at Universe Today

April 29, 2024April 29, 2024 by Mark Thompson

Measuring Exoplanetary Magnetospheres with the Square Kilometer Array

Life on Earth would not be possible without food, water, light, a breathable atmosphere and surprisingly, a magnetic field. Without it, Earth, and its inhabitants would be subjected to the harmful radiation from space making life here, impossible. If we find exoplanets with similar magnetospheres then those worlds may well be habitable. The Square Kilometer Array (SKA) which is still under construction should be able to detect such magnetospheres from radio emissions giving us real insight into our exoplanet cousins.

April 28, 2024April 28, 2024 by Mark Thompson

Psyche is Still Sending Data Home at Broadband Speeds

NASA’s Psyche spacecraft is shown in a clean room at the Astrotech Space Operations facility near the agency’s Kennedy Space Center in Florida on Dec. 8, 2022. DSOC’s gold-capped flight laser transceiver can be seen, near center, attached to the spacecraft. NASA/Ben Smegelsky

When I heard about this I felt an amused twinge of envy. Over the last year I have been using an unimpressive 4G broadband service and at best get 20 Mbps, NASA’s Psyche mission has STILL been getting 23 Mbps at 225 million km away! It’s all thanks to the prototype optical transmission system employed on the probe. It means it can get up to 100 times more data transmission rate than usual radio.

April 26, 2024April 26, 2024 by Mark Thompson

Astronomers Will Get Gravitational Wave Alerts Within 30 Seconds

Astronomers and astrophysicists could use these alerts and information to understand how neutron stars behave and study nuclear interactions between neutron stars and black holes colliding.

Any event in the cosmos generates gravitational waves, the bigger the event, the more disturbance. Events where black holes and neutron stars collide can send out waves detectable here on Earth. It is possible that there can be an event in visible light when neutron stars collide so to take advantage of every opportunity an early warning is essential. The teams at LIGO-Virgo-KAGRA observatories are working on an alert system that will alert astronomers within 30 seconds fo a gravity wave event. If warning is early enough it may be possible to identify the source and watch the after glow.

April 26, 2024April 26, 2024 by Mark Thompson

Japan’s Lunar Lander Survives its Third Lunar Night

Space travel and exploration was never going to be easy. Failures are sadly all too common but it’s wonderful to see missions exceed expectations. The Japanese Space Agency’s SLIM lunar lander was only supposed to survive a single day but it’s survived three brutal, harsh lunar nights and is still going. The temperatures plummet to -170C at night and the lander was never designed to operate into the night. Even sat upside down on the surface it’s still sending back pictures and data.

April 26, 2024April 26, 2024 by Mark Thompson

Black Holes Can Halt Star Formation in Massive Galaxies

This research published in Nature is the first direct confirmation that supermassive black holes are capable of shutting down galaxies

It’s difficult to actually visualise a universe that is changing. Things tend to happen at snails pace albeit with the odd exception. Take the formation of galaxies growing in the early universe. Their immense gravitational field would suck in dust and gas from the local vicinity creating vast collections of stars. In the very centre of these young galaxies, supermassive blackholes would reside turning the galaxy into powerful quasars. A recent survey by the James Webb Space Telescope (JWST) reveals that black holes can create a powerful solar wind that can remove gas from galaxies faster than they can form into stars, shutting off the creation of new stars.

April 25, 2024April 25, 2024 by Mark Thompson

Mapping the Milky Way’s Magnetic Field in 3D

We are all very familiar with the concept of the Earth’s magnetic field. It turns out that most objects in space have magnetic fields but it’s quite tricky to measure them. Astronomers have developed an ingenious way to measure the magnetic field of the Milky Way using polarised light from interstellar dust grains that align themselves to the magnetic field lines. A new survey has begun this mapping process and has mapped an area that covers the equivalent of 15 times the full Moon.

April 25, 2024May 1, 2024 by Mark Thompson

NASA’s New Solar Sail Has Launched and Will Soon Deploy

Solar Sails are an enigmatic and majestic way to travel across the gulf of space. Drawing an analogy to the sail ships of the past, they are one of the most efficient ways of propelling craft in space. On Tuesday a RocketLab Electron rocket launched NASA’s new Advanced Composite Solar Sail System. It aims to test the deployment of large solar sails in low-earth orbit and on Wednesday, NASA confirmed everything is looking good for sail deployment

April 24, 2024April 24, 2024 by Mark Thompson

TESS Finds its First Rogue Planet

This illustration shows a rogue planet traveling through space. Credit: NASA/JPL-Caltech/R. Hurt (Caltech-IPAC)

Well over 5,000 planets have been found orbiting other star systems. One of the satellites hunting for them is TESS, the Transiting Exoplanet Survey Satellite. Astronomers using TESS think they are made a rather surprising discovery; their first free-floating – or rogue – planet. The planet was discovered using gravitational microlensing where the planet passed in front of a star, distorting its light and revealing its presence.

April 24, 2024April 24, 2024 by Mark Thompson

There are Four Ways to Build with Regolith on the Moon

Based on the technical mechanisms of bonding and cohesion between particles, regolith solidification and formation technologies can be categorized into four groups: reaction solidification (RS), sintering/melting (SM), bonding solidification (BS), and confinement formation (CF) methods. Credit: Charun Bao

Over the last few years I have been renovating my home. Building on Earth seems to be a fairly well understood process, after all we have many different materials to chose from. But what about future lunar explorers. As we head closer toward a permanent lunar base, astronauts will have very limited cargo carrying capability so will have to use local materials. On the Moon, that means relying upon the dusty lunar regolith that covers the surface. Researchers have now developed 20 different methods for creating building materials out of the stuff. They include solidification, sintering/melting, bonding solidification and confinement formation. But of all these, which is the best?

April 22, 2024April 22, 2024 by Mark Thompson

Astronaut Food Will Lose Nutrients on Long-Duration Missions. NASA is Working on a Fix

NASA astronaut and Expedition 68 Flight Engineer Nicole Mann works in the International Space Station’s Harmony module on the BioNutrients-2 investigation that uses genetically engineered microbes to provide nutrients, and potentially other compounds and pharmaceuticals, on demand in space. NASA

Astronauts on board the International Space Station are often visited by supply ships from Earth with food among other things. Take a trip to Mars or other and the distances are much greater making it impractical to send fresh supplies. The prepackaged food used by NASA loses nutritional value over time so NASA is looking at ways astronauts can produce nutrients. They are exploring genetic engineering techniques that can create microbes with minimal resource usage.