From October 2019 to February 2020, Betelgeuse (the bright orange star at Orion’s right shoulder, not Tim Burton’s magical necroprankster) was seen to dim dramatically, even more so than it typically does. It was something that wasn’t just observed with telescopes but also it was quite obvious to the naked eye from most locations. This…
Ceres’ Salty Mound is the Result of Ongoing Geologic Activity
First observed with the Hubble Space Telescope in 2003, the curious bright spots on the dwarf planet Ceres—the largest world in the main asteroid belt between Mars and Jupiter—was brought into exquisite focus with the arrival of NASA’s Dawn spacecraft in 2015. The largest and brightest of these spots—a single 340-meter-high mound named Cerealia Facula…
What’s the Weather on Jupiter? Cloudy with a Chance of Mushballs
Recent findings from NASA’s Juno mission, in orbit around Jupiter since July 4, 2016, may have solved an ongoing mystery about the composition of the giant planet’s upper atmosphere; namely, the case of the missing ammonia. (Jupiter is composed mostly of hydrogen and helium but also contains trace amounts of ammonia, methane, and water vapor.) North…
NASA’s Perseverance Rover Launches to Mars
Today, July 30, 2020 at 7:50 a.m. EDT (11:50 UTC) NASA’s Mars 2020 rover Perseverance launched from Cape Canaveral, Florida aboard a ULA Atlas V 541 rocket. The weather at the Cape was picture-perfect and the launch went smoothly, sending NASA’s newest robotic mission to Mars on its way for an anticipated arrival and landing…
Ganymede’s Polar Ice is ‘Disrupted’ by Jupiter’s Plasma
The first-ever infrared images of Ganymede’s north pole, taken on December 26, 2019 with the JIRAM instrument aboard NASA’s Juno spacecraft, show that the gigantic moon’s polar ice lacks any crystalline structure like the water ice we’re familiar with typically does here on Earth. This is a result of constant bombardment by charged plasma in…
For the Umpteenth Time No NASA Didn’t Change the Zodiac
Come on everyone, no. Just…no. NASA did not “change your star sign.” NASA neither creates “star signs” nor names or changes them. This is because 1. that’s not NASA’s job, and 2. “star signs”—i.e., astrology—is junk science. (And that’s being grossly generous with the term “science.”)
Solar Orbiter’s First Images Reveal the Sun Covered With Tiny “Campfires”
The pictures are in! The first image data from the cameras aboard ESA’s Solar Orbiter were revealed today, July 16 2020, and reveal many features on our Sun we’ve never been able to see before—including small-scale flare activity dubbed “campfires.” (I say small-scale but they’re actually the size of entire countries!) “The Sun might look…
How To Spot Comet NEOWISE
Info from NASA on July 14, 2020: Observers in the Northern Hemisphere are hoping to catch a glimpse of Comet C/2020 F3 (NEOWISE) as it zips through the inner solar system before it speeds away into the depths of space. [Editor’s note: many already have!] Discovered on March 27, 2020 by NASA’s Near-Earth Object Wide-field…
Sunlight Can Crack Rocks on Asteroids
Here on Earth the surfaces of pretty much all but the most freshly-exposed (geologically-speaking, of course) rock surfaces exhibit the effects of atmospheric weathering—from rain, snow, and ice to wind, dust-blown sand, flowing water, and extreme heat. And underlying all of that are the relentless forces of tectonic activity. But on dry, airless, and tectonically…
When Spirit Spotted a Swarm of Devils
Mars may be pretty low on traffic these days but, on this day back in 2005, NASA’s Spirit rover (the twin to Opportunity) seemed to find itself at a busy intersection as several blustery dust devils zipped past, one after the other!
NASA’s Solar Probe Spots Comet NEOWISE and its Two (Maybe Three) Tails
As skywatchers around the world (and even above it!) are capturing increasingly beautiful views of the current naked-eye comet C/2020 F3 (NEOWISE), NASA’s Parker Solar Probe was able to grab a picture from a much different vantage point as it traveled beyond the orbit of Mercury on its way toward a July 11 flyby of…
NASA’s Next Rover Reminds Us That, As Always, We Persevere
NASA recently released this inspirational video in preparation of the targeted July 30, 2020 launch of its newest Mars rover, Perseverance (along with the Ingenuity helicopter!) Give it a watch. It’s good.
