Harvard astrophysicist challenges NASA chief over mystery space object: 'Not an asteroid'
Avi Loeb tells Fox News Digital why he believes 1998 KY26 could be the lost Soviet Phobos 1 spacecraft and says a 2031 mission could settle the mystery.
Avi Loeb tells Fox News Digital why he believes 1998 KY26 could be the lost Soviet Phobos 1 spacecraft and says a 2031 mission could settle the mystery