Tuesday March 26, 2019
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NASA Spacecraft Sends Back Close-Ups of Dwarf Planet Ceres

Before arriving at Ceres, Dawn explored the asteroid Vesta. Both are in the asteroid belt between Mars and Jupiter

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After lettuce, astronauts could grow beans in space in 2021. Pixabay

NASA’s Dawn spacecraft is sending back incredible close-ups of the dwarf planet Ceres.

The spacecraft has been circling Ceres since 2015. In June, it reached its lowest orbit yet, skimming the surface from just 22 miles (35 kilometers) up.

The latest pictures released Monday offer unprecedented views of a huge impact crater known for its bright salty deposits. Landslides are clearly visible on the rim.

This mosaic of a prominent mound located on the western side of Cerealia Facula was obtained by NASA's Dawn spacecraft on June 22, 2018 from an altitude of about 21 miles (34 kilometers) above the dwarf planer Ceres. (NASA/JPL-Caltech/UCLA/MPS/DLR/IDA.
This mosaic of a prominent mound located on the western side of Cerealia Facula was obtained by NASA’s Dawn spacecraft on June 22, 2018 from an altitude of about 21 miles (34 kilometers) above the dwarf planer Ceres. (VOA)

Chief engineer Marc Rayman of NASA’s Jet Propulsion Laboratory in Pasadena, California, says the results are better than hoped.

Before arriving at Ceres, Dawn explored the asteroid Vesta. Both are in the asteroid belt between Mars and Jupiter.

Also Read: NASA Scientists to Use Submarines to Hunt For Meteorite Remains

Launched in 2007 with an ion engine, Dawn is nearing the end of its extended mission. NASA expects the spacecraft to last just another few months. (VOA)

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NASA Astronauts Spacewalk to Change ISS Batteries

Spacewalkers have now spent a total of 55 days, 21 hours and 39 minutes working outside the station

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NASA researchers have created the atmosphere of a super-hot planet outside our solar system, here on Earth. Pixabay

Two NASA astronauts – Nick Hague and Anne McClain – have successfully completed an over six hour spacewalk and replaced the ageing batteries on the International Space Station (ISS).

During the six hour, 39 minute spacewalk, Hague and McClain replaced nickel-hydrogen batteries with newer, more powerful lithium-ion batteries for the power channel on one pair of the station’s solar arrays, NASA said in a statement on Friday.

They also installed adapter plates and hooked up electrical connections for three of the six new lithium-ion batteries installed on the station’s starboard truss.

These new batteries provide an improved power capacity for operations with a lighter mass and a smaller volume than the nickel-hydrogen batteries.

The batteries store power generated by the station’s solar arrays to provide power to the station when the station is not in the sunlight, as it orbits the Earth during orbital night.

In addition, the astronaut duo also removed debris from outside of the station, securing a tieback for restraints on the Solar Array Blanket Box, NASA said.

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NASA will also have its first all-female spacewalk at the end of the month, when astronauts Anne McClain and Christina Koch will get to float around in space. The spacewalk will last about seven hours, according to the US space agency. Pixabay

McClain will again take a spacewalk on March 29 along with flight engineer Christina Koch to work on a second set of battery replacements on a different power channel in the same area of the ISS.

This would be the first-ever spacewalk with all-female spacewalkers, NASA said.

A third spacewalk on April 8 by Hague and David Saint-Jacques of the Canadian Space Agency will lay out jumper cables between the Unity module and the S0 truss, at the midpoint of the ISS’s backbone.

Also Read- Should Live Broadcast on Social Media Platforms be Banned?

This work will establish a redundant path of power to the Canadian-built robotic arm, known as Canadarm2. They will also install cables to provide for more expansive wireless communications coverage outside the orbital complex, as well as for enhanced hardwired computer network capability.

Space station crew members have until now conducted 214 spacewalks in support of assembly and maintenance of the orbiting laboratory.

Spacewalkers have now spent a total of 55 days, 21 hours and 39 minutes working outside the station. (IANS)