As part of a new push towards high-risk, high- impact science, Nasa is starting a study of unexplained phenomena.

The space agency said on Thursday that it was setting up an independent team to look at how much information is publicly available and how much more is needed. How to use this information in the future will be considered by the experts.

The traditional scientific community may think that Nasa is selling out by venturing into the controversial topic, but Zurbuchen disagrees.

Zurbuchen said that they are not shying away from the risk of reputation. The biggest challenge of these phenomena is that they are data poor.

This is the first step in trying to figure out what is happening in the sky.

The nine-month study will cost no more than $100,000. No classified military data will be used in the project.

The team will be led by David Spergel who is an astronomer. Spergel said at the news conference that the UAPs will probably have more than one explanation.

Spergel said that they need to approach the questions with humility. I was a cosmologist for most of my life. We don't know what makes up the majority of the universe. There are things we don't know.