Saturday October 20, 2018
Home Science & Technology NASA’s Dawn c...

NASA’s Dawn captures closest-yet images of Ceres

0
//
45
NASA's spacecraft Dawn credit: www.nasa.gov
Republish
Reprint

By NewsGram Staff-Writer

NASA’s orbital spacecraft Dawn has sent the closest images of the dwarf planet called Ceres. The stunning pictures display Ceres’ cater formation features with tall conical mountains and narrow braided fractures on it.

credit: www.nbcnews.com
credit: www.nbcnews.com

“Dawn’s view is now three times sharper than its previous mapping orbit, revealing exciting new details of this intriguing dwarf planet,” said Marc Rayman, Dawn’s chief engineer and mission director at NASA’s Jet Propulsion Laboratory in California.

At its current orbital altitude of 1,470 km, Dawn takes 11 days to capture and return images of Ceres’ whole surface. Over the next two months, the spacecraft will map the entirety of Ceres six times. The spacecraft is using its framing camera to extensively map the surface, enabling 3-D modelling. Every image from this orbit has a resolution of 450 feet per pixel, and covers less than one percent of the surface of Ceres.

At the same time, Dawn’s visible and infra-red mapping spectrometer is collecting data that will give scientists a better understanding of the minerals found on Ceres’ surface. Engineers and scientists will now refine their measurements of Ceres’ gravity field which will help mission planners in designing Dawn’s next orbit.

Dawn is the first spacecraft to visit a dwarf planet, and also the first to orbit two distinct solar system targets. In late October, Dawn will begin spiralling toward the final orbit, which will be at an altitude of 375 km.

Click here for reuse options!
Copyright 2015 NewsGram

Next Story

NASA’s Space Probe ‘Dawn’ To Return Due To Lack of Key Fuel

It has continued to gather high-resolution images, gamma ray and neutron spectra, infrared spectra and gravity data at Ceres.

0
NASA
The initial proposal deadline is November 19, 2018, the US space agency added. Flickr

After 11 years of gathering breathtaking imagery, and performing unprecedented feats of spacecraft engineering, Dawn — NASA’s space probe for the asteroid belt — is drawing to a close due to lack of a key fuel, the US space agency said.

Launched from Cape Canaveral Air Force Station in September 2007, Dawn was majorly tasked to study two of the three known protoplanets of the asteroid belt Vesta and Ceres, which when combined, make up 45 per cent of the mass of the main asteroid belt.

The spacecraft is likely to run out of a key fuel knwon as hydrazine — which keeps it oriented and in communication with Earth — between September and October.

When that happens, Dawn will lose its ability to communicate with Earth, but will remain in a silent orbit around Ceres for decades, NASA said in a statement late on Thursday.

“Not only did this spacecraft unlock scientific secrets at these two small but significant worlds, it was also the first spacecraft to visit and orbit bodies at two extraterrestrial destinations during its mission,” said Lori Glaze, acting director of the Planetary Science Division at Headquarters in Washington.

Dawn NASA. asteroid
Dawn will lose its ability to communicate with Earth, but will remain in a silent orbit around Ceres for decades. (IANS)

 

From 2011 to 2012, the spacecraft swept over Vesta, capturing images of craters, canyons and even mountains of this planet-like world.

Then in 2015, Dawn’s cameras spotted a cryovolcano and mysterious bright spots on Ceres, which scientists later found might be salt deposits produced by the exposure of briny liquid from Ceres’ interior.

“Dawn has shown us alien worlds that, for two centuries, were just pinpoints of light amidst the stars. And it has produced these richly detailed, intimate portraits and revealed exotic, mysterious landscapes unlike anything we’ve ever seen,” said Marc Rayman, Dawn’s mission director and chief engineer at NASA’s Jet Propulsion Laboratory, in California.

It has continued to gather high-resolution images, gamma ray and neutron spectra, infrared spectra and gravity data at Ceres.

Dawn NASA. asteroid
This colorful composite image from NASA’s Dawn mission shows the flow of material inside and outside a crater called Aelia on the giant asteroid Vesta. Flickr

 

Nearly once a day, Dawn will swoop over Ceres about 22 miles (35 kilometers) from its surface — only about three times the altitude of a passenger jet — gathering valuable data until it expends the last of the hydrazine that feeds thrusters controlling its orientation.

Also Read: NASA Rocket Launch Tests Supersonic Parachute for Mars Rover Landings

Engineers have designed Dawn’s final orbit, around Ceres, which has no atmosphere, to ensure it will not crash for at least 20 years — and likely decades longer, NASA said.

According to Rayman, Dawn’s is “an inert, celestial monument to human creativity and ingenuity.”(IANS)