Nasa is due to hold a press conference to "discuss new results about ocean worlds."
According to their website, the organisation has new research to present about "the search for life beyond Earth".
The event will be live-streamed on Thursday at 7pm UK time and will feature commentary from the world’s experts on alien life.
Nasa said: "These new discoveries will help inform future ocean world exploration – including NASA’s upcoming Europa Clipper mission planned for launch in the 2020s – and the broader search for life beyond Earth".
The discoveries came from the Cassini spacecraft and the Hubble Space Telescope.
Aside from this, they refused to give any more clues about what the event would entail, or what is included in the discoveries.
The US agency has a habit of holding mysterious events when it is due to make an important announcement.
Many are excited about the press conference and are wondering what it will entail.
The event, which will take place at the James Webb Auditorium at Nasa Headquarters in Washington, will include remote participation from experts across the country.
A question-and-answer session will take place during the event with reporters on site and by phone. Members of the public also can ask questions during the briefing using #AskNASA.
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