B Wow. Great picture of exoplanet HR8799e - 129Ly distant!

jim mcnamara

Mentor
3,438
1,633

russ_watters

Mentor
18,405
4,649
If that photo is real, it's dozens of orders of magnitude [guess] higher resolution than anything I've ever seen before. We sure they didn't accidentally post an artist's conception? I've seen that before...

[edit: ehhhh, might only be 5 or 6 orders of magnitude. It's about a million and a half times further away than Jupiter and that looks like a Hubble photo of Jupiter. ]
 
Last edited:

jbriggs444

Science Advisor
Homework Helper
7,063
2,350
From the article:

"Our observations suggest a ball of gas illuminated from the interior"

The artist's rendition clearly shows illumination from the exterior.
 

DrClaude

Mentor
6,813
2,935
This is definitely not a picture of the planet.

The researchers were able to disentangle the light form the star for that of the planet, allowing to analyse spectrally the light and find the composition of the atmosphere. This is quite an achievement, but we're still far from having a picture of the planet in the common sense of the term.
 

Klystron

Gold Member
292
305
You may be correct. I do not know. Original paper:

Plus, if it were "real", it would be a computer processed image, not a real photo.
After skimming the paper, the image is not a visible light photograph but an amalgam of gravitic and various spectra-graphic data values. Perhaps the term 'computer aided art' applies. The paper claims at least some of the infrared data is measured directly from the exoplanets. All the planetary data has been corrected for 'washout' from the primary.
 
This is not a photo, is just an artistic impression
 

jim mcnamara

Mentor
3,438
1,633
Excellent - I stand corrected.
 

Ken G

Gold Member
4,431
327
Also, the article said "The exoplanet is thoroughly inhospitable—leftover energy from its formation and a powerful greenhouse effect heat HR8799e to a hostile temperature of roughly 1000 °C. " So that suggests a combination of internal and reprocessed external light, either of which they could have meant by "internal illumination", but it would be spread more or less equally over the whole face of the planet. If that's even an artistic impression for this planet, it's a very poor impression. At 1000 Celsius, there would be plenty of optical emission that is not reflected light.
 

Want to reply to this thread?

"Wow. Great picture of exoplanet HR8799e - 129Ly distant!" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top