404 years ago tonight, January 7, 1610, the Pisan astronomer Galileo Galilei looked up at a bright Jupiter at opposition through his handmade telescope and saw three little “stars” next to it, which piqued his natural scientific curiosity. He soon realized that these little objects weren’t stars at all but rather moons that orbited the…
Tag: moons
Celebrate the Holidays with Cassini and Saturn
Cassini couldn’t make it to the mall this year to do any Christmas shopping but that’s ok: we all got something better in our stockings than anything store-bought! To celebrate the holidays the Cassini team has shared some truly incredible images of Saturn and some of its many moons for the world to “ooh” and “ahh”…
Dione to Join the List of Moons with Underground Oceans?
Earth may display its seas on its surface for all the Universe to see, but further out in the Solar System liquid oceans are kept discreetly under wraps, hidden beneath cratered surfaces of ice and rock. And while Saturn’s moon Enceladus sprays its salty subsurface ocean out into space, other moons are less ostentatious —…
Europa Has Water and H2O Too
According to research by NASA astronomers using the next-generation optics of the 10-meter Keck II telescope, Jupiter’s ice-encrusted moon Europa has hydrogen peroxide (aka H2O2) across much of the surface of its leading hemisphere, a compound that could potentially provide energy for life if it has found its way into the moon’s subsurface ocean. “Europa has the…
Vote to Name Pluto’s Moons!
I’ve written about this a couple of times before and put up polls here on Lights in the Dark, but now it’s actually semi-official: you can vote on the names for Pluto’s newest moons! (Looks like they may have taken some of our earlier suggestions too!)
Daphnis Is Back!
It’s been a while since I posted an image of my favorite moon of Saturn, but while looking through some recent raw images returned by the Cassini spacecraft I spotted it: Daphnis, the little sculptor shepherd moon!
Here’s Something Else to Vote On: Names for Pluto’s Newest Moons!
Since we’re all in the democratic mood here today in the U.S., how about another chance to put your vote in on something: names for Pluto’s newest moons!
Up and Over the Rings – Atlas and Pandora
Cassini’s at it again! After its last flyby of Titan the spacecraft changed course, heading up and away from Saturn’s equatorial plane at an angle that will allow it to better study the rings and the planet’s polar regions. This raw image, captured on May 23, shows Cassini’s view as it heads upwards. It shows…
Mighty Melanthius
The 662-mile-wide Tethys is one of the most heavily cratered worlds in the solar system, tied with sister moons Rhea and Dione. In this recent raw image captured by Cassini on April 14, we can see some of the moon’s larger craters, including Melanthius with its enormous central peak.
A Little Pas de Deux: Tethys and Dione
Saturn’s moon Tethys, its giant Odysseus crater in plain view, passes in front of of the slightly darker Dione in this animation made from several raw images acquired by Cassini earlier this month. Pretty cool!
Two New Moons For Jupiter
Jupiter is our solar system’s resident behemoth. It’s an enormous planet that has more mass than all the others combined, not to mention the largest gravitational and magnetic influence in the solar system (besides the Sun, of coourse.) It’s no wonder that it also has the most moons in orbit around it than any of…
Fantastic Four
New image from Cassini and the CICLOPS imaging team shows Titan, Dione, Pan and Pandora in the same shot! Pan is furthest to the left, a tiny moon tucked into the gap in the rings. Dione hovers in front of the cloud-covered Titan, and Pandora is the football-shaped moon just outside the edge of the…
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