Author Topic: NASA - Kepler updates  (Read 213859 times)

Offline Johnnyhinbos

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Re: NASA - Kepler updates
« Reply #500 on: 12/14/2017 01:50 PM »
John Hanzl. Author, action / adventure www.johnhanzl.com

Offline Star One

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Re: NASA - Kepler updates
« Reply #501 on: 12/14/2017 05:15 PM »
Apparently Kepler has found an eighth planet in the Kepler-90 system. Itís the first solar system to have as many planets as ours.

Offline Star One

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NASA - Kepler updates
« Reply #502 on: 12/14/2017 05:24 PM »
Artificial Intelligence, NASA Data Used to Discover Eighth Planet Circling Distant Star

https://www.nasa.gov/press-release/artificial-intelligence-nasa-data-used-to-discover-eighth-planet-circling-distant-star

« Last Edit: 12/14/2017 05:46 PM by Star One »

Offline Alpha_Centauri

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Re: NASA - Kepler updates
« Reply #503 on: 12/14/2017 05:26 PM »
Cool! Me and Tony, also of this place, helped find one of the planets in this system; https://arxiv.org/abs/1310.5912v3

We had actually identified the others before the Kepler team but were beaten to publishing them IIRC.

Offline Dao Angkan

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Re: NASA - Kepler updates
« Reply #504 on: 12/14/2017 06:43 PM »
Cool stuff. I think it was said that they analysed 670 systems out of 150,000 (a little under 0.5%) and found two planets. They plan to analyse the whole data set, but the 670 systems analysed were already known to have transiting planets, so maybe ~1/3 - 1/4 of known transiting Kepler systems. Of course, it may also detect planets in previously unknown transiting systems. They didn't want to say how many more planets they might detect from the whole data set, but maybe we can hope for low double digits (my crude statistical analysis, not theirs).

They said that they analysed weaker signals than the previous cut-off, but didn't say if there was also a cut-off to how weak the signals that they analysed were. Unfortunately no-one asked if there was the possibility of improving the detection technique to tease out even weaker signals, or if they were already at the limit for their current algorithm.
« Last Edit: 12/14/2017 06:49 PM by Dao Angkan »

Offline Star One

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Re: NASA - Kepler updates
« Reply #505 on: 12/14/2017 07:00 PM »
I assume itís only a matter of time before we discover a system with 10+ planets.

Offline jkumpire

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Re: NASA - Kepler updates
« Reply #506 on: 12/14/2017 07:02 PM »
I assume itís only a matter of time before we discover a system with 10+ planets.

Like maybe our own system?

Offline Dao Angkan

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Re: NASA - Kepler updates
« Reply #507 on: 12/14/2017 07:16 PM »
One of the questions was "who finds a nine planet system first, Kepler or Mike Brown?" lol

Offline notsorandom

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Re: NASA - Kepler updates
« Reply #508 on: 12/14/2017 07:18 PM »
One of the questions was "who finds a nine planet system first, Kepler or Mike Brown?" lol
Tombaugh ;)

Offline Dao Angkan

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Re: NASA - Kepler updates
« Reply #509 on: 12/14/2017 07:23 PM »
I assume itís only a matter of time before we discover a system with 10+ planets.

Likely to be Kepler 90.


Offline Dao Angkan

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Re: NASA - Kepler updates
« Reply #510 on: 12/14/2017 07:30 PM »
One of the questions was "who finds a nine planet system first, Kepler or Mike Brown?" lol
Tombaugh ;)

Pluto analogues count! (as long as they're outside of our solar system).

Offline Star One

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Re: NASA - Kepler updates
« Reply #511 on: 12/14/2017 07:33 PM »
I didnít see this mentioned in the NASA press release

Quote
It was heartening to hear at the news conference that the training model used in these detections will be made publicly available. According to Googleís Shallue, about two hours suffice to train the model on a desktop computer using open source machine learning software called TensorFlow, which is produced by Google. When the code becomes available, anyone will be able to use the model on the publicly available Kepler data on their own PCs.

The paper is Shallue & Vanderburg, ďIdentifying Exoplanets with Deep Learning: A Five Planet Resonant Chain around Kepler-80 and an Eighth Planet around Kepler-90,Ē accepted for publication in The Astronomical Journal, and for now available here.

https://www.centauri-dreams.org/?p=38957

Offline Dao Angkan

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Re: NASA - Kepler updates
« Reply #512 on: 12/14/2017 07:55 PM »
Yes, one of the questions was if this makes citizen scientists redundant. The answer was that humans can spot unusual patterns, currently neural networks can only spot stuff that they've been trained to look for. For example, the recent exo-comet discovery by a citizen scientist, a neural-net would not have discovered that. Neural networks may make monotonous, time consuming searches previously performed by citizen scientists redundant, but they can now use open source machine learning software and openly available data (such as from Kepler) to make discoveries in other, possible more productive ways.

Offline Johnnyhinbos

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Re: NASA - Kepler updates
« Reply #513 on: 12/14/2017 10:11 PM »
Well, an AI could also look for stuff itís been trained for - and train it for the usual patterns. Then report everything else...
John Hanzl. Author, action / adventure www.johnhanzl.com

Offline jebbo

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Re: NASA - Kepler updates
« Reply #514 on: 12/15/2017 07:18 AM »
Cool! Me and Tony, also of this place, helped find one of the planets in this system; https://arxiv.org/abs/1310.5912v3

We had actually identified the others before the Kepler team but were beaten to publishing them IIRC.

Yup. We were beaten to publication on a *lot* of planets ... mostly in one paper by Wang et al (? Name may be wrong, it was a long time ago)

Edit: nice to see Kepler-90 (I still think of it as KOI-351) back in the news :-)

--- Tony
« Last Edit: 12/15/2017 07:19 AM by jebbo »

Offline speedevil

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Re: NASA - Kepler updates
« Reply #515 on: 12/18/2017 04:31 PM »
Kepler: The Era of Exoplanets Has Arrived - Jeff Coughlin & Geert Barentsen (SETI Talk 2017)
https://www.youtube.com/watch?v=y2bDaD7IlC4?t=2462

I haven't seen this - though I have not read the whole thread in detail.

Mission end - out of fuel to desaturate the reaction wheels - in March, April 2018.

Hopefully, TESS will launch around this time.
I'm unsure how useful combined observations for calibration on any overlap would be.

Offline Chris Bergin

Re: NASA - Kepler updates
« Reply #516 on: 01/20/2018 05:56 PM »
The K2-138 system: the first exoplanet system discovered by citizen scientists -
https://www.nasaspaceflight.com/2018/01/k2-138-system-first-exoplanet-system-discovered-citizen-scientists/

- By Justin Davenport, his first article for the site :)

Offline jebbo

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Re: NASA - Kepler updates
« Reply #517 on: 01/20/2018 06:20 PM »
The title and description are misleading. Plenty of systems have been discovered by citizen scientists, but the discoveries have been simultaneous or partial. K2-138 is the first discovered entirely by citizen scientists ...

It is also odd to only mention Exoplanet Explorers and not the previous Planet Hunters that did the same for the original Kepler data ...

--- Tony

Online Steven Pietrobon

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Re: NASA - Kepler updates
« Reply #518 on: 01/25/2018 02:41 AM »
What, no mention of who the amateur planet hunters were?! The discoverers were from Australia, participating in an online planet hunting survey as part of the ABC's (Australian Broadcasting Commission) Stargazing Live show with Prof. Brian Cox and host Ms. Julia Zemiro.

https://www.gizmodo.com.au/2018/01/australian-amateur-astronomers-discover-star-system-with-five-rocky-planets/

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Star One

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Re: NASA - Kepler updates
« Reply #519 on: 01/25/2018 06:45 AM »
What, no mention of who the amateur planet hunters were?! The discoverers were from Australia, participating in an online planet hunting survey as part of the ABC's (Australian Broadcasting Commission) Stargazing Live show with Prof. Brian Cox and host Ms. Julia Zemiro.

https://www.gizmodo.com.au/2018/01/australian-amateur-astronomers-discover-star-system-with-five-rocky-planets/



Pretty sure the article I posted about this in the astronomy thread a while back mentioned their nationality.

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