Mars Rover’s Dead, Comet Incoming, JWST’s First Exoplanet
By Anton Pozdnyakov
Keep your eyes on the sky for a comet, another Mars rover has died, the leaky Soyuz will be replaced, JWST dominates the American Astronomical Society meeting, and Starship is just around the corner.
A Good Comet is Coming
Keep your eyes on the sky over the next few weeks for your first chance to see a comet in 2023. Designated C3/2022 ZTF, the comet was first discovered in March 2022, and it has been getting closer to Earth and brightening. It’s expected to reach its brightest point in early February, taking a path through the sky to bring it close to the Big Dipper and Cassiopea. Astronomers have calculated that it’s on a 50,000-year orbit, so it’s been eons since its last visit. It should look great in a pair of binoculars or a small telescope.
More about the incoming comet.
Another One Bites The Martian Dust
The terrible dust on Mars has claimed another victim. This time it’s China’s Zhurong rover, which was supposed to wake up from hibernation on December 26th. China’s Nationational Space Administration has tried to reestablish communications with Zhurong, but they’ve been unsuccessful. The rover was put into hibernation six months ago to help it survive the Martian winter when temperatures get down to -100C. A regional dust storm also cloaked the area, reducing the energy it could use to keep its batteries operational.
The Leaky Soyuz Needs to Be Replaced
The Soyuz MS-22 that was leaking coolant last month will be replaced. This decision was made after inspecting the ship currently attached to the ISS. Roscosmos will launch the replacing MS-23 ship in February in an autonomous mode. Temperatures inside MS-22 can climb into the low 40s. Thus, it is considered unsafe to use in a crewed flight unless absolutely necessary. The other option for the ISS crew is the Crew Dragon which should be able to carry up to 7 people. But let’s hope that it won’t be needed.
James Webb Finds Its First Exoplanet
James Webb confirmed its first exoplanet. It was first discovered and marked as an exoplanet candidate by the TESS telescope. It’s called LHS 475b and it’s located 41 light-years away from us. The interesting part is that the planet has almost the exact diameter of Earth. For now, JWST definitely confirmed the existence of the exoplanet, but it also did observe its atmosphere. Researches will need some more time to determine its exact composition.
Early Galaxies from James Webb
This week the American Astronomical Society is meeting for the first time since the James Webb Space Telescope became operational, so there’s been a mountain of Webb news. One remarkable story is this image of primordial galaxies captured by JWST. These galaxies are just a few thousand light-years across and have so much star formation they’re heating the surrounding gas and dust, so it glows in the ultraviolet (redshifted to infrared after billions of years). Their structure matches newly discovered “green pea” galaxies, which have the same behavior and are much closer, and, therefore, easier to study.
Build your own ELT
Got a little extra time on your hands? Here’s to keeping you busy. The European Southern Observatory has released a paper model of its Extremely Large Telescope. Although the actual telescope will measure almost 40 meters across and can see Earthlike planets orbiting sunlike stars, yours will be much smaller, made of paper, and can’t make any observations at all. Still, it’ll be fun, and you can learn more about the telescope as you craft yours out of paper.
More about the model of the Extremely Large Telescope.
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The post Mars Rover’s Dead, Comet Incoming, JWST’s First Exoplanet appeared first on Universe Today.
January 15, 2023 at 05:05AM
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