If life exists elsewhere in the solar system, it may well reside in the ocean of Jupiter's icy moon Europa.

The mysterious world appears to have the necessary ingredients for life as we know it. Beneath its frozen exterior is a single body of water that's so deep it may hold more liquid than all of the oceans on Earth. Europa is believed to have enough carbon, hydrogen, nitrogen, oxygen and other key elements to form the building blocks of living organisms. And scientists suspect the heat generated as the moon is stretched and squeezed by Jupiter's gravity would provide enough energy to sustain any creatures that might be there.

That's why NASA is building Europa Clipper.

The spacecraft will blast off from the Kennedy Space Center in Florida a year from now and reach its destination in 2030.

A small team of political scientists and astronomers at the University of British Columbia has conducted a study of the number of filings to the International Telecommunication Union (ITU) by entities wishing to send satellites into low orbit and has found the numbers growing so fast that soon there will not be room for new satellite deployments. In their paper is published in the journal Science.

Satellites designed for use in communications systems must be put into low Earth orbit—most of them are used for internet services. But those wishing to deploy them must file for orbital space with the ITU, a United Nations entity that has been tasked with regulating Earth orbital space.

In recent years, large entities such as Starlink have filed for multiple orbital space slots in large bunches; such slots are used by multiple small satellites that together comprise a constellation. These are needed because the satellites are deployed in a geosynchronous orbit, which means multiple satellites are needed to create networks over large geographical areas, such as countries.

Prior research has shown that as more satellites are launched into low orbit, the belt around the planet becomes more crowded—eventually, there will no longer be room for any new satellites.