"That's no moon..." -B. Kenobi But in this case, it is... a lost moon of Neptune not seen since its…
If you do your own stargazing or participate in our Sunday night Virtual Star Parties, you’ve probably noticed we’re starting…
It took sharp and patient eyes, but researcher Mark Showalter of the SETI Institute has found a tiny moon orbiting…
Voyager 2 mosaic of Neptune's largest moon, Triton (NASA) At 1,680 miles (2,700 km) across, the frigid and wrinkled Triton is Neptune’s…
Neptune is one of four planets in our Solar System with planetary rings. Neptune was not discovered until 1846 and…
Five of the planets in the night sky are easy to see with the unaided eye, and have been known…
How did Neptune get its name? Shortly after its discovery, Neptune was only referred to as "the planet exterior to…
[/caption] Voyager 1 is in uncharted territory. The long-lived spacecraft has entered a new region of space that lies between…
[/caption] The confessed (and remorseless) "Pluto Killer" Mike Brown has turned his gaze – and the 10-meter telescope at the…
[/caption] To celebrate the first complete orbit of the planet Neptue since its discovery in 1846, the Hubble Space Telescope…