Your comments

Dear Becky,

Many thanks for your suggestion. We have added it to our backlog and will let you know when it has been implemented.

Kind regards,


Dear Max,

Yes we are planning to add other telescopes to the planning tool and we are extremely interested in adding the Roman Space Telescope! And having the SIAF file will make the process even easier for us. I will email you now to put you in contact with the team and to start discussing details. 

Many thanks for contacting us!

Best regards,

Debbie on behalf of the ESASky team

Dear Bart,

This issue is now fixed in the latest version of ESASky, which now links to the New ISO Data Archive (NIDA). If you click on the preview column (magnifying glass icon), a postcard preview of the observation, coming from NIDA, opens in a window and clicking on the Archive column sends you to the NIDA results page for the corresponding ISO observation:

Many thanks for telling us about the issue!

Best regards,

Deborah, on behalf of the ESASky Team

Dear Roland,

Just an update, it is now possible to overlay user catalogues and catalogues from VizeiR using the Jupyter widget pyESASky, within a notebook. Filtering of the loaded columns is also possible. An example doing this can be found in the following notebook:

And see the accompanying video:

Finally, information on installing pyESASky can be found here:

We'll let you know when it's possible to query and upload user catalogues and VizieR catalogues in ESASky. 

Many thanks and regards,


Dear Jareel,

We have advanced considerably on the ESASky API and we have the documentation available here:

As you requested, it is possible to hide certain elements of the UI. Do let us know your opinion on the API and any improvements you may have!

Many thanks and regards,


Dear User,

If you type 'Sun' in the search you can select the option [Star] Sun, however we currently do not have any observations of the Sun in ESASky. 

If in the future we link up with heliophysics missions (for example) that do observe the sun, then observations shall appear. 

Many thanks for your query.

Kind regards,

Deborah, on behalf of the ESASky team

Dear ESASky User,

Yes, many thanks, we are aware of the irregular Chandra footprints/FoVs and we have already contacted them about it. We hope they will fix the issue soon.

Best regards,

Debbie on behalf of the ESASky team


Sorry for the delayed reply. This effect is most likely instrumental and due to the fact that GALEX was looking at an extremely bright star in the ultraviolet (alpha Andromedae, a massive 'blue' star, with spectral type B8 and a companion binary star with spectral type A3, seen as the smaller orange circle to the right). The GALEX mission was not designed to have the sensitivity to be able to detect planets. 

Best regards,

Deborah on behalf of the ESASky team