Cassini looks past the southern pole of Rhea to get a view of Dione on the far side of the rings in this image, captured on January 11, 2011. Rhea, Saturn’s second-largest moon, is approximately 950 miles in diameter and is literally covered in craters. Dione, also heavily cratered, is nearly 700 miles wide. It’s…
Tag: astronomy
Flare Out
Today at 7:35 UT, hours before the final Discovery shuttle launch, the Sun had a launch of its own: an M3-class solar flare spewed a giant plume of material hundreds of thousands of miles into space. Luckily this ejection was not facing Earth at the time, but the active region responsible is gradually rotating into…
The Sun’s Still At It!
‘Tis the season…the season for solar activity, that is! Last week was just the beginning, even though it saw some of the most powerful solar flares of the past four years send charged solar particles streaming toward Earth. Luckily our magnetosphere was in such a position to absorb much of it, creating some beautiful aurora…
Firing Off Flares
Can’t see the video below? Click here. Here’s a look at the activity on the Sun that’s gotten many talking about solar storms this week. Taken with the Solar Dynamics Observatory’s AIA 335 camera channel, which is sensitive to light emitted by Iron-14 ions in the Sun’s active corona layer, this video spans about two…
Tyche: Have We Marked the Spot of Planet X?
There’s been a lot of buzz lately about the existence of a “new” planet in our solar system, a gas giant that has eluded discovery by astronomers thus far because of its purported incredibly distant orbit – over 350 times farther from the Sun than Pluto, or a whopping 15,000 times farther from the Sun…
New Images of Tempel 1!
This just in! Cropped and sharpened via high pass slightly by yours truly. More to come! ADDED: Here’s another! Nice lighting here! (I removed some motion blur from this one via Photoshop.) And another (nice resolution here): See more images on the Stardust mission page here. Remember….they’re looking for whatever did this. Could it be…
From the LITD Archives: Voyager’s Valentine
On February 14, 1990, after nearly 13 years of traveling the outer solar system the Voyager 1 spacecraft passed the orbit of Pluto and turned its camera around to take a series of photos of the planets. The image above shows those photos, isolated from the original series and labeled left to right, top to…
Happy Birthday to LITD!
Today is Lights in the Dark’s second birthday! I published my first post two years ago today, in an attempt to carry on what Bill Dunford had started with his similarly-themed blog Riding With Robots. When Bill had to step away from his blogging for a while, I asked if he’d be cool with me…
Tempel of Love
This Valentine’s Day – that’s Monday, guys! – NASA’s Stardust spacecraft will have an out-of-this-world date with a heavenly body: the comet Tempel 1, seen above in an image mosaic taken by the Deep Impact spacecraft nearly six years ago. On July 4, 2005, Deep Impact made a rendezvous with Tempel 1, passing as…
The Sun in STEREO
NASA’s STEREO mission – twin spacecraft orbiting the Sun, one ahead of Earth and the other behind – has reached a milestone in its mission today: both spacecraft are now in position to be able to view the entire Sun at the same time, giving scientists the ability to monitor solar activity on both sides!…
Getting WISE to asteroids
NASA’s Wide-field Infrared Survey Explorer – WISE – has recently finished a survey of small bodies in our solar system. The survey mission, called NEOWISE (for Near Earth Objects), used WISE’s infrared-imaging capabilities to identify 20 new comets and more than 33,000 main-belt asteroids. WISE also spotted 134 near-Earth objects – asteroids or comets that…
Kepler’s Discovery: New Worlds for the Finding
Can’t see the video below? Click here. Today NASA held a press conference at 1pm EST to present the discovery of over 1,200 exoplanet candidates by the Kepler telescope, an orbiting space observatory that’s been watching a section of the sky near the constellation Cygnus for the past year and a half. (The spacecraft launched…
Lights in the Dark 