space

Space debris and satellites orbiting close to Earth have proliferated in recent years. Two articles in Nature Astronomy warn of their impact on light pollution. In the first, a team calculates the increase in the brightness of the night sky and warns of the effect on ecosystems and astronomical observations from Earth. In the second, which is a commentary, the authors call for limiting the production of artificial light and the number of satellites in orbit, calling on the scientific community to take on the big space and big light companies. Both articles are co-signed by Salvador Bará, from the Agrupación Astronómica Coruñesa, and the second by Fabio Falchi, from the University of Santiago de Compostela.

The European Space Agency (ESA) has just announced who will form part of its new generation of astronauts and there are two Spaniards among those selected: Pablo Álvarez and Sara García (the latter, in reserve). They thus become the third and fourth Spanish astronauts in history, after NASA's Michael López-Alegría (with Spanish and US nationality) and Pedro Duque, the first Spanish astronaut to be selected by ESA in 1992. No Spanish candidate was selected in the European agency's 1998 and 2008 calls for applications. 

After almost three months of delays caused by various technical problems and two hurricanes, the Artemis I mission was successfully launched this morning, the first of a programme that will take the first woman astronaut to the moon. It has 42 days ahead of it, during which the spacecraft will orbit our satellite and test the stability of this lunar orbit, because in the future a space station will be located there to receive the astronauts on their journey from Earth.

Early this morning, the Spanish air navigation manager restricted a strip of airspace due to the possible passage of the Chinese space object CZ-5B, which had detached from the Long-March 5B rocket. The fragment finally fell over the Pacific Ocean and Spanish airspace is no longer restricted.

Romano Corradi, director of the Gran Telescopio de Canarias, assesses the deepest and sharpest infrared image of the distant universe taken by the James Webb Space Telescope, an international collaboration of the space agencies of the United States (NASA), Europe (ESA) and Canada (CSA).

An analysis published in Nature Astronomy quantifies the risk to human life posed by impacts of space rocket fragments on Earth, which are more likely to occur in the southern part of the planet.

Today the International Space Station (ISS) is completely dependent on Russia to keep it in orbit. Space X spacecraft, which NASA contracts, carry astronauts but cannot propel the ISS to maintain its altitude. A new American spacecraft, Cygnus, which has already conducted a successful propulsion test, is expected to be able to do so.