Space News & Blog Articles

Searching for past or present life on Mars is the sole driving force behind every mission we send to the Red Planet, from orbiters to landers to rovers. However, there remains a concern in the scientific community of Earth-based microbes hitching a ride on Mars-bound spacecraft, also called forward contamination. The concern is potentially mistaking Earth microbes for Mars life or Earth microbes potentially influence samples of Mars life we might find. While NASA is dedicated to mitigating it as much as possible, could new methods help determine how long Earth-based microbes could survive on Mars, this alleviating concerns for forward contamination?

The Sun regularly emits streams of charged particles (solar wind) from its upper atmosphere (the corona), which flow throughout the Solar System that interacts with Earth's magnetic field. This is what powers the beautiful aurorae visible in the Northern and Southern hemispheres (Aurora Borealis and Australis. It can also play havoc with modern technological systems, including telecommunications, GPS navigation, and electrical power grids. Since 2015, NASA's Magnetosphere Multiscale (MMS) mission has been collecting data on Earth's magnetosphere.

Young stars are known for their powerful radiation and strong winds. They can shape their gaseous surroundings, both promoting and inhibiting other stars from forming, depending on the circumstances. Their strong winds also have another effect: the stars inflate gaseous bubbles around themselves.

Supernovae explosions are hard to miss. When they explode, they can outshine all of the stars in their host galaxies for months. But understanding the physics behind these powerful phenomena requires studying their progenitors before they explode.

Asteroid mining companies are finally getting off the ground, and that is raising some concerns about the impact those activities will have on the space environment. A new paper published in Acta Astronautica from Anna Marie Brenna of the University of Waikato in New Zealand discusses a framework that she thinks might work to solve the legal challenges facing those who want to protect the space environment and those who want to exploit it.

If you’ve been following exoplanet research over the last couple of years, you’ve definitely heard of K2-18b. Located 124 light years away in the constellation Leo, it’s attracted a lot of attention as it sits squarely in its red dwarf host star’s habitable zone, and measurements of the James Webb Space Telescope show its atmosphere is rich in carbon dioxide and methane. It’s one of the prime candidates for a “Hycean” world - one where a thick hydrogen-rich atmosphere covers a global liquid water ocean. It is such an intriguing target for Search for Extraterrestrial Intelligence (SETI) researchers that they turned two of the most powerful radio telescopes in the world to watch K2-18b’s system. A recent paper, available in pre-print on arXiv, shows that there is likely no artificial narrow-band radio signals that are equivalent to our technology level coming from the planet, despite millions of potential hits.