Expert Voices

Both missions intend to search the planet for signs of life.

What we’re looking for is evidence of past life, either direct chemical or organic signs in the composition and the chemistry of rocks, or textural evidence in the rock record.

The Earth has been blue for over 4 billion years because of the liquid water on its surface.

No-one has visited the Moon since 1972. But with the advent of commercial human spaceflight, the urge to return is resurgent and generating a new space race.

Crewmembers sacrifice everything they can to save their simulated Martian mission at HI-SEAS

The universe may be filled with "mirror" particles — and these otherwise-undetectable particles could be shrinking the densest stars in the universe, turning them into black holes.

Stressed out and teased by the weather, the Valoria 1 crew immerses themselves in artistic and imaginative projects.

A mysterious "kick" in the early universe may have produced more matter than antimatter. And that imbalance may have also led to the creation of dark matter, researchers now say.

Most stars in the universe today are found in massive galaxies called ellipticals, named for their stretched-out-circle shape.

It’s hard to care about bootprints sunk in soil 238,900 miles away as humanity suffers the combined burden of an unforgiving virus and a political unease.

The South African Astronomical Observatory in Cape Town is the oldest permanent observatory in the southern hemisphere: it turned 200 in 2020.

Albert Einstein’s theory of general relativity profoundly changed our thinking about fundamental concepts in physics, such as space and time.

Surprisingly, the fate of a star is easy to predict. All you need to know is how big it is.

According to a recent report, there have been no signs of supersymmetry, and the theory is looking a little shaky.

A team of physicists recently used a string-theory technique to reveal that we're on the cusp of detecting phase transitions in the early universe through their gravitational wave signature.

What if there is more than one cosmological agent for dark energy? This mixture would have strange effects in our universe, making it potentially detectable with upcoming surveys.

If you look up in the southern sky you can see the “pointer” stars, pointing towards the Southern Cross.