May 2019
Active debris removal faces legal minefield
...measures to remove objects from low Earth orbit (LEO) and geostationary orbit (GEO) after the end of their missions... could apply to tacit consent in the context of these in-orbit operations. ESA is planning the world’s first ever active debris...
August 2020
Battle for the night sky - from telescopes to ad-breaks
... from space. Previous attempts to provide this service focused on larger, more powerful and more expensive satellites in geostationary orbit (GEO), but they faced the issue of longer signal delays because of the greater distance compared with LEO...
September 2024
Hypersonics and the route to orbit
...point-to-point travel and LEO missions. The next iteration, HELLO-2, will carry 5500 kg to LEO, 1730 kg to geostationary orbit (GEO) and 760 kg to the lunar surface, and will be followed later by a proposed HELLO-3M, a crewed lunar mission. Naturally...
01 June 2021
Space junk collision highlights need for intervention
...larger than 5-10 cm in low Earth orbit (LEO) and 30 cm to 1 m in geostationary orbit (GEO) - as well as several thousands to millions of non-trackable debris particles in orbit around the Earth. “These in-orbit collisions and explosions highlight the...
September 2023
A multifaceted approach to space sustainability
... other factors such as post-mission disposal. This has only been a consideration in geostationary orbit (GEO), where both the frequencies and the use of orbital positions are regulated by the ITU. But now, when radio regulators licence a system...
April 2025
Space sustainability and the role of space situational awareness
... risks. Space situational awareness supports the long-term viability of congested orbits, particularly in low Earth orbit (LEO) and geostationary orbit (GEO) while promoting collective responsibility for the space environment and driving investment...
