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Summary

[edit]
File information
Description

Starlink Satellite Trails over Brazil - NASA's Astronomy Picture of the Day, December 10, 2019.

Source

https://apod.nasa.gov/apod/ap191210.html

Date

2019-12-10

Author

Egon Filter

Permission
(Reusing this file)

Creative Commons Attribution 4.0 International License


Explanation: What are those streaks over the horizon?

New Starlink satellites reflecting sunlight.

SpaceX launched 60 Starlink communication satellites in May 2019 and 60 more in November.[1]

These satellites and thousands more are planned by communications companies in the next few years that may make streaks like these relatively common.[2]

Concern has been voiced by many in the astronomical community about how reflections from these satellites may affect future observations into space.[3][4]

In the pictured composite of 33 exposures, parallel streaks from Starlink satellites are visible over southern Brazil.

Sunflowers dot the foreground, while a bright meteor was caught by chance on the upper right.

Satellite reflections are not new[5][6] -- the constellation of 66 first-generation Iridium satellites launched starting 20 years ago produced some flares[7][8] so bright that they could be seen during the day.[9] Most of these old Iridium satellites, however, have been de-orbited over the past few years.[10][11]


Licensing

[edit]


egonf
7:07 PM (42 minutes ago)
to me

Dear Star Traveler,

Sure, the terms of release the image under the CC-by-4.0 is fair. You can use it.

Best regards,
Egon


On 19 Dec 2020, at 16:53, Star Traveler <star.traveler.usa@---.com> wrote:


Hello Egon,

Would you be willing to release this celebrated photo of yours [1] using a CC-by or similar free license such that it can be incorporated into Wikipedia [2]?

This would enable including the image in pages like this one on light pollution from satellites: https://en.wikipedia.org/wiki/Satellite_flare

If you are open to this, you could release it with such a license by posting the image somewhere along with the license statement, or by uploading it to Wikipedia.  Uploading to Wikipedia requires that you have an active account in Wikipedia, which can take time to establish, so alternatively, you could reply to this email saying that you release the image under a specific license such as the CC-by-4.0

Thanks for considering this!

- Star Traveler


[1] https://apod.nasa.gov/apod/ap191210.html

[2] https://en.wikipedia.org/wiki/Wikipedia:File_copyright_tags#For_image_creators

[3] https://creativecommons.org/licenses/by/4.0/

References

[edit]
  1. ^ "STARLINK MISSION". 2019-11-11. Archived from the original on 2019-11-12.
  2. ^ Henry, Caleb (2019-10-15). "SpaceX submits paperwork for 30,000 more Starlink satellites".
  3. ^ "AAS Issues Position Statement on Satellite Constellations" (Press release). 2019-06-10.
  4. ^ Hall, Shannon (2019-11-11). "As SpaceX Launches 60 Starlink Satellites, Scientists See Threat to 'Astronomy Itself'".
  5. ^ "Iridium Flare by Chris Dorreman - NASA Astronomy Picture of the Day". 1998-04-02.
  6. ^ "Heavens Above". Retrieved 2020-12-19.
  7. ^ Mark, Martin (2015-09-02). "The Flare and the Galaxy by Martin Mark - NASA Astronomy Picture of the Day".
  8. ^ Mark, Martin (2015-09-02). "The Flare and the Galaxy by Martin Mark - NASA Astronomy Picture of the Day".
  9. ^ Iridium flares in real-time. 2014-11-23.
  10. ^ "Flarewell Iridium Satellite Communications". Archived from the original on 2018-09-29.
  11. ^ Dickenson, David (2019-03-15). "The Iridium Flare Era is About to End".

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Date/TimeThumbnailDimensionsUserComment
current00:53, 20 December 2020Thumbnail for version as of 00:53, 20 December 20201,080 × 720 (164 KB)StarTravelerUSA (talk | contribs){{Information | description = Starlink Satellite Trails over Brazil - NASA's Astronomy Picture of the Day, December 10, 2019. | source = https://apod.nasa.gov/apod/ap191210.html | date = 2019-12-10 | author = Egon Filter | permission = Creative Commons Attribution 4.0 International License | other_versions = | additional_information = }} Explanation: What are those streaks over the horizon? New Starlink satellites reflecting sunligh...

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