Monday, February 13, 2023

Green comet C/2022 E3 (ZTF) may be leaving the solar system | Space

The comet C/2022 E3 (ZTF) became quite the celestial celebrity in early 2023 as its close approaches to the sun and then Earth made its bright green glow visible from our planet, but this might be its last visit.

According to NASA's Jet Propulsion Laboratory (NASA JPL) the comet is on a 50,000-year orbit of the sun, or at least it was. The close approach of C/2022 E3 (ZTF) to the inner solar system might have altered its orbit enough to ensure it is now on a one-way trip out of the solar system.

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Publisher: Space.com
Date: 2023-02-13T11:00:35Z
Author: Robert Lea
Twitter: @SPACEdotcom
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Green comet C/2022 E3 (ZTF) may be heading out of the solar system for good

The comet C/2022 E3 (ZTF) became quite the celestial celebrity in early 2023 as its close approaches to the sun and then Earth made its bright green glow visible from our planet, but this might be its last visit.

As a result of this nudge, the outward leg of this journey, which C/2022 E3 (ZTF) is currently undergoing, might not just see it racing out of the inner solar system, it might carry it out of our planetary system altogether.

Twitter: @YahooNews
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Now Is Your Last Chance To See The Green Comet Before It Disappears (Maybe Forever) | IFLScience

The last time Comet C/2022 E3 (ZTF) was visible in our skies Neanderthals still roamed the Earth, 50,000 years ago , so if you don't want to have to wait another 50 millennia, the time to see it is now. Well, maybe. But more on that later.

The comet is now just under the average limit for visibility with the naked eye , but a good pair of binoculars should allow you to see it with no problem. Luckily, over the next few nights, you'll have a pretty big, red signpost to find it as it will be next to Mars in the sky.

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Publisher: IFLScience
Twitter: @IFLScience
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'Impossible' new ring system discovered at the edge of the solar system, and scientists are ...

Astronomers have discovered an entirely new ring system within the solar system , and it's located at such a great distance from its dwarf planet parent that it should be impossible. 

The ring surrounds Quaoar, which is around half the size of Pluto and located beyond Neptune .

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Publisher: _____
Date: 2023-02-10T11:00:00Z
Author: Robert Lea
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Detecting Solar System Analogs Through Joint Radial Velocity/Astrometric Surveys - Astrobiology

Earth-mass exoplanets on year-long orbits and cool gas giants (CGG) on decade-long orbits lie at the edge of current detection limits.

In our Solar System, the two CGGs, Jupiter and Saturn, played a critical role in the formation, evolution, and habitability of Earth.

The Nancy Grace Roman Space Telescope will be capable of precision astrometry using its wide field imager (target ∼5-20 μas 1σ measurement error for bright stars) and could extend the astrometric observational baseline of Gaia to ∼25 years.

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Publisher: Astrobiology
Date: 2023-02-13T02:11:07 00:00
Author: Keith Cowing
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