In a surprise finding, astronomers using the NASA/ESA Hubble Space Telescope have discovered that the blowtorch-like jet from a supermassive black hole at the core of a huge galaxy seems to cause stars to erupt along its trajectory. The stars, called novae, are not caught inside the jet, but apparently in a dangerous neighbourhood nearby.

Hera is ESA's first planetary defence mission, set to probe the lingering mysteries of a unique target among the 1.3 million known asteroids of our Solar System: the first body to have had its orbit shifted by human action.

Spacecraft are among the most complex machines ever built, so need to be broken down into sets of subsystems, and this video shows how ESA and European industry put together Hera.

Hera’s chemical propulsion subsystem is what moves it through space, while its electrical power subsystem supplies and regulates electrical power throughout the spacecraft as needed. Its data handling subsystem

Solar wind is a never-ending stream of charged particles coming from the Sun. Rather than a constant breeze, this wind is rather gusty. As solar wind particles travel through space, they interact with the Sun's variable magnetic field, creating chaotic and fluctuating motion known as turbulence.

This video confirms something long suspected: the turbulent motion of solar wind begins very close to the Sun, inside the solar atmosphere known as the corona. Small disturbances affecting solar wind in the corona are carried outward and expand, generating turbulent flow further out in space.

By blocking out direct light coming from

Taking place at KAP Europa in Frankfurt, Germany, from 27 to 28 November 2024, the second ESA Earth Observation Commercialisation Forum will bring together stakeholders from the Earth observation and space commercialisation sectors, including end users, space industry players, entrepreneurs, private and public investors and policymakers to discuss and promote commercial opportunities in Earth observation.

The event is an important part of ESA’s broader strategy to enhance the economic return from Earth observation investments to ensure that space technology contributes to sustainable economic growth.

A spacecraft in flight cannot help but change the space about it – which can pose problems. A new paper in the Journal of Geophysical Research: Space Physics presents a study on how ESA’s Jupiter Icy Moons Explorer, Juice, is interacting with the solar wind. The consequences include potentially problematic surface charging, a dense cloud of photoelectrons that surround the spacecraft and a more than 65-m-long wake of ion-free space behind it, resembling the trail of a boat.