Astronomy

Sascha Quanz searches for traces of life on extrasolar planets orbiting alien stars. The astrophysicist believes that gaining an understanding of life and its origin on Earth is an important stepping stone.

Mars’s liquid iron core is smaller and denser than previously thought. Not only is it smaller, but it is also surrounded by a layer of molten rock. This is what ETH Zurich researchers conclude on the basis of seismic data from the InSight lander.

A strong quake in the last year of the NASA Mars InSight mission, enabled researchers at ETH Zurich to determine the global thickness and density of the planet's crust. On average, the Martian crust much thicker than the Earth’s or the Moon’s crust and the planet’s main source of heat is radioactive.

With a constellation of five satellites, the international LIFE initiative led by ETH Zurich hopes to one day detect traces of life on exoplanets. A laboratory experiment in the Department of Physics is now set to demonstrate the planned measurement method.

When it comes to measuring how fast the Universe is expanding, the result depends on which side of the Universe you start from. A recent EPFL study has calibrated the best cosmic yardsticks to unprecedented accuracy, shedding new light on what’s known as the Hubble tension.

Life has existed on Earth for billions of years. Stabilising mechanisms have helped our planet remain habitable to this day.