NASA says UFOs are probably balloons, planes, or solar glints — but not aliens

• NASA said it can't explain what UAP are, but it doesn't think they're from off the planet.
• NASA says the sightings can be explained by earthly phenomena like planes, balloons, and weather.
• The announcement comes from a year-long investigation into how NASA can better study UFOs. 

Yes, unidentified anomalous phenomena (UAP) are real and a threat to national security, but they're not from out of this world, NASA announced during a press briefing Thursday.

Last year, the agency assembled an independent panel of experts to assess how it can best identify and collect data on UAP, commonly known as UFOs. 

That panel compiled its findings into a report, which NASA released on Thursday.