US defense officials have said the Pentagon's recent effort to investigate such sightings has resulted in hundreds of new reports being investigated with most remaining unexplained.
space
The Pinwheel Galaxy has a new bright spot.
Here's what we know (and don't know) about China's mysterious space plane which just landed after nine months in orbit on a secret mission
LP 791-18d orbits a small red dwarf star about 90 light-years away in a constellation called Crater in the southern celestial hemisphere
The blast lasted for three years and is over ten times as powerful as the brightest supernova
A new analysis of chaos in the solar system reveals how planetary collisions are avoided over billions of years.
Astronomers have puzzled over the moon's structure since well before any probes landed there
The interstellar traveler is gradually losing power, but a clever tweak means it can continue running all of its scientific instruments
In 2021 what may have been a similar spacecraft flew to the edge of space & returned to Earth on the same day in a mission that was also kept largely under wraps
The InSight lander was sent to Mars to study the planet’s interior, mostly by way of marsquakes