Neptune's moon Nereid was discovered by the Dutch astronomer Gerard Kuiper. This was the second of 14 moons discovered at ...

Using two infrared space telescopes and a 23-year gap, scientists may have spotted a mysterious, slow-moving object beyond ...

Friday, May 2, presents a perfect opportunity to catch the mighty ice giant Neptune close to the planets Saturn and Venus in ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.