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Fraser
2018-Feb-03, 11:51 PM
Thanks to a new study performed by a pair of astrophysicists from the University of Oklahoma, the first extra-galactic planets have now been discovered!
The post For the First Time, Planets Have Been Discovered in ANOTHER Galaxy! (https://www.universetoday.com/138478/first-time-planets-discovered-another-galaxy/) appeared first on Universe Today (https://www.universetoday.com).


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DaveC426913
2018-Feb-04, 03:19 AM
This is incredible. I read this the other day.

Something I don't quite understand.


"Image of the gravitational lens RX J1131-1231 galaxy with the lens galaxy at the center and four lensed background quasars."


So, in this popular image, the four artifacts aren't the detected planets right?

https://www.universetoday.com/wp-content/uploads/2018/02/slack-imgs.com_-e1517700133100-580x405.jpg

slang
2018-Feb-04, 10:22 AM
No, the planets are inferred from shifts in the spectrum, not actually seen. The four artifacts are different images of the same quasar, I think. A popular target for study, apparently: https://en.wikipedia.org/wiki/RX_J1131-1231

Here's the paper: https://arxiv.org/abs/1802.00049, fwiw :)

The other picture with the article is confusing, as the 'detected' planets must be unbound, so not in a solar system.

DaveC426913
2018-Feb-04, 03:18 PM
No, the planets are inferred from shifts in the spectrum, not actually seen. The four artifacts are different images of the same quasar, I think. A popular target for study, apparently: https://en.wikipedia.org/wiki/RX_J1131-1231

Here's the paper: https://arxiv.org/abs/1802.00049, fwiw :)

The other picture with the article is confusing, as the 'detected' planets must be unbound, so not in a solar system.

Thanks, yeah. The article was pretty ambiguous about that.