At 3:34 p.m. EDT (19:34 UTC) today, April 30, 2015, after more than ten years in space – and four of them in orbit – the MESSENGER spacecraft’s operational life came to a conclusive end when it impacted the surface of Mercury, as planned.
After revealing the surface of the innermost planet like no mission ever before, MESSENGER’s last act was to contribute one more crater to Mercury’s battered and Sun-scoured face.
The impact site was out of view (and thus out of communication range) of Earth at the time, but based on the spacecraft’s trajectory and time when its signal was last received it’s known that it very likely struck a low ridge just north of a basin named Shakespeare, near 54.5 degrees north latitude and 210.1 degrees east longitude.
Colliding at a velocity of 8,700 mph, MESSENGER’s impact is estimated to have made a crater about 52 feet (16 meters) across.
“Going out with a bang as it impacts the surface of Mercury, we are celebrating MESSENGER as more than a successful mission,” said John Grunsfeld, associate administrator for NASA’s Science Mission Directorate. “The MESSENGER mission will continue to provide scientists with a bonanza of new results as we begin the next phase of this mission – analyzing the exciting data already in the archives, and unraveling the mysteries of Mercury.”
See MESSENGER’s very last transmitted image below.
The 72-mile (116-km) -wide crater Adedin is seen at an oblique angle in this mosaic made from images acquired by NASA’s MESSENGER spacecraft. The angle highlights the crater’s central peak complex which surrounds a shallow depression that could have a volcanic origin, as well as fine cracks in the floor of its basin and a slumped and terraced section of its far wall. The crater was named after the Bangladeshi painter Zainul Abedin (1914-1976).
And I suggest you enjoy it – it will be one of the last images we see from MESSENGER!
On March 18, 2011, MESSENGER became the first human-made spacecraft to enter orbit around Mercury. Now almost four years, eight billion miles, and over 260,000 images later, MESSENGER is nearing the end of its operational life.
To commemorate the many achievements of the mission, scientists from NASA and the MESSENGER teams at the Johns Hopkins University Applied Physics Laboratory and the Carnegie Institution for Science are giving people around the world the opportunity to name five craters on Mercury — names which, once selected, will become official through the IAU!
NASA’s Curiosity rover may be busy exploring the rugged and rocky interior of Gale Crater but it does get a chance to skygaze on occasion. And while looking at the Sun on June 3, 2014 (mission Sol 649) the rover’s Mastcam spotted another member of our Solar System: tiny Mercury, flitting across the Sun’s face.
Silhouetted against the bright disk of the Sun, Mercury barely appears as a hazy blur in the filtered Mastcam image above. But it was moving relatively quickly during the transit and passed the darker smudges of two Earth-sized sunspots over the course of several hours. It was the first time Mercury has ever been imaged from Mars, and also the first time we’ve observed a planet transiting our Sun from another world besides our own.
Read the rest of my article (and watch a cool animation of the transit) on Universe Today here.
Image credit: NASA/JPL-Caltech/MSSS/Texas A&M
Mercury’s ready for its close-up, Mr. MESSENGER! At an incredible 5 meters per pixel, the image above is one of the highest-resolution images of Mercury’s surface ever captured. It was acquired on March 15 with the MESSENGER spacecraft’s MDIS (Mercury Dual Imaging System) instrument and shows an 8.3-km (5.2-mile) -wide section of the planet’s north polar region, speckled with small craters and softly rolling hills.
And, with a new low-altitude mission ahead, there’ll be plenty more like this — and likely even better — in the months ahead. Read the rest of this article here.
Image credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
33 years after his death, John Lennon’s name has been officially given to a crater on Mercury. Imagine that.
The 95 km (59 mile) wide Lennon crater is one of ten newly named craters on the planet, joining 114 other craters named since NASA’s MESSENGER spacecraft’s first Mercury flyby in January 2008.