Back in December of 2001, Saturn’s moon Titan passed in front of two background stars (called an “occultation”) from the point of view of the Hale Telescope at Palomar Observatory. Astronomers used the incredible resolving ability of the 5-meter telescope’s adaptive optics to watch the event, which revealed the diffraction of the stars’ light through…
Tag: astronomy
What Has Curiosity Found on Mars?
……E.T., maybe?? 😉 Kidding aside, the internet science world is abuzz with the anticipation of some big news from the Mars Science Laboratory team, spurring many on Twitter to make up their own amusing suggestions.  (Martian Twinkies??) What that news could be — organic compounds? water ice? methane outgassings? — is still anyone’s guess. But since…
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!
Experience Eclipse Totality (VIDEO)
Totality — that brief period during a solar eclipse when the Moon is completely centered in front of the Sun’s disk — is a truly amazing sight, so much so that many people who have seen it once (a privileged group that doesn’t include me, sadly!) will travel across the globe in an effort witness…
Titan: Saturn’s Glow-In-The-Dark Moon
Titan just never ceases to amaze. Saturn’s largest moon, it’s wrapped in a complex, multi-layered nitrogen-and-methane atmosphere ten times thicker than Earth’s. It has seasons and weather, as evidenced by the occasional formation of large bright clouds and, more recently, an area of open-cell convection forming over its south pole. Titan even boasts the distinction…
A Spooky Space Ghost for Halloween!
Looking like something out of a Tim Burton movie, the eerie shapes seen above are part of a cloud of gas and dust located 1,200 light-years away in the constellation Cepheus. First identified in 1966, the human-like figures with “arms” raised give the nebula its spooky nickname: the “Ghost Nebula”.
Mercury’s Sufferingly Sulf’rous Surface
Named for the 17th-century Venetian composer, the southern half of Mercury’s Vivaldi basin is seen in this image acquired on August 26 by NASA’s MESSENGER spacecraft. The 213-km (132-mile) -wide crater’s smooth floor is contrasted by the incredibly rugged terrain beyond its outermost ring — a result of the ejected material that was flung out…
Blue Marble, Pale Blue Dot…whatever you call it, it’s Home
35 years ago today, September 18, 1977, NASA’s Voyager 1 spacecraft turned its camera homeward just about two weeks after its launch, capturing the image above from a distance of 7.25 million miles (11.66 million km). It was the first time an image of its kind had ever been taken, showing the entire Earth and Moon together…
Rhapsody on an Impact Event: Mercury’s Rachmaninoff Crater
Rachmaninoff is a spectacular double-ring basin on Mercury, and this color view is one of the highest resolution color image sets acquired of the basin’s floor. Visible around the edges of the frame is a circle of mountains that make up Rachmaninoff’s peak ring structure. The color of the basin’s floor inside the peak-ring differs…
How Curiosity Will Meet Mars
At 10:31 p.m. PDT tonight, August 5 (1:31 a.m. EDT Aug. 6), after nearly 9 months of travel, NASA’s Mars Science Laboratory (and a rover named Curiosity) will arrive at the Red Planet to explore the interior of Gale Crater and hunt for the ingredients of life. Of course, between arriving and hunting, there has…
Dione in Color
Although made mostly of ice and rock, Saturn’s moon Dione (pronounced DEE-oh-nee) does have some color to it — although mostly chilly hues of steel blue, as seen in this color-composite made from raw images acquired by Cassini on July 23.
Ancient Ice Found in a Frigid Lunar Crater
NASA’s Lunar Reconnaissance Orbiter has found water ice lining a deep crater located on the Moon’s south pole — as much as 22% of the surface material of the crater appears to be composed of ice, NASA and university scientists report.
Lights in the Dark 