Nasa is set to announce new discoveries in a teleconference on Thursday held at the agency's headquarters in Washington, DC.
The discoveries were made by the Cassini spacecraft and the Hubble Space Telescope and will guide future missions to explore other worlds for extraterrestrial life, Nasa said in a statement.
The focus of the conference will be on worlds within our own solar system.
Members of the public are welcome to ask Nasa questions throughout the briefing using the hastag #AskNASA.
The scientists on hand to deliver the news and answer questions will include Jim Green, director, planetary science division at Nasa headquarters, Mary Voytek, astrobiology senior scientist at Nasa headquarters, and Linda Spilker, Cassini project scientist at Nasa's Jet Propulsion Laboratory in Pasadena, California.
The teleconference will be broadcast live online at 2pm EDT (7pm BST). You can watch it here: