Your comments

Dear Becky,

We're pleased to tell you we've added this functionality to ESASky

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Dear Millennium Twain,

From what I understand, this is a very large catalogue that you'd like to view in ESASky, and to possibly filter for certain types of objects? 

I'm happy to tell you that ESASky now provides access to VizieR and the 4 versions of the Milliquas catalogue are appearing in ESASky. When I search in VizieR, the latest version of the catalogue appears to be: The Million Quasars (Milliquas) catalogue, version 7.2 (Flesch, 2021); the VII/290/catalog, and I can find it and load it in ESASky by doing the following:

  • Click on the 5th icon in the top left (when hovering it says 'Explore data from external data centres in this region')
  • Click on the 'VizieR' tab
  • In the search field, search for 'Flesch' or even better, search for 'VII/290/catalog'
  • Open the 'VII_nonstellar' tree
  • If you want to load sources within the field of view displayed in ESASky, toggle on the 'FoV restricted' button in the top right of the External Data Centres window and then select the first icon on the left of the catalogue, in the Open column (when hovered over it says 'open table'). 
  • By toggling off the 'FoV restricted' button you will load the whole table, however, please note this is limited to 10,000 sources so as not to overload the browser. What you can next do is filter the query for quasars, for example, by filtering the 'Type' column in the catalogue. You can do this using the ADQL functionality within ESASky (select the 3rd icon in the Query column (when hovered over it says 'create a custom ADQL query'). And you can type something like the following (and see the image below): 

SELECT TOP 10000 * FROM "VII/290/catalog"

WHERE 1=CONTAINS( POINT('ICRS', RAJ2000, DEJ2000), CIRCLE('ICRS', 235.65,10.0, 10.0))

AND Type = 'Q'

The above ADQL code brings back the first 10000 rows (TOP 10000) and all columns (*) from the VII/290 catalogue (FROM "VII/290/catalog") centred at coordinates RA=235.65, DEC = 10.0 and a radius of 10.0 degrees (2nd line) and also only selecting Quasars (Type = 'Q'). 

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Note, this type of query is still restricted to returning 10000 objects in the sky (even if you remove TOP 10000). Let us know if you need to visualise more objects in the sky or the type of use case you are trying to do. 

To find out more about this functionality and about ADQL commands, please read our help pages here:

I hope all this helps.

Best regards,

Deborah, on behalf of the ESASky team

Dear Andy,

We've released the latest version of ESASky today and I'm happy to say we've fixed the bug you reported to us. Proper motion columns are correct again:

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Many thanks for reporting this to us!

Best regards,

Debbie on behalf of the ESASky team

Dear Nuria,

Many thanks for your use case, we've created a ticket and added it to our backlog. 

We'll let you know as soon as we're able to implement it!

Many thanks and regards,

Debbie on behalf of the ESASky team

Dear Nuria,

Great to hear from you! There is a method, albeit slightly indirect, to measure the distance in ESASky. You can do this using the cone, box or polygon search. When you select these in the search field, click on one star and then move to another and the distance appears (see this video for an example).

As you know, you can also load up your own target list, via the scroll icon in the search field, which will highlight your objects in the sky with a square. I'm not sure if this would completely fulfil your use case though? Can you give more details how you'd like to search for more than one object at a time? Would you want them to be tagged, or an extra column to be added with distances? 

Many thanks and regards!

Debbie on behalf of the ESASky team

Dear Andy,

This is indeed a bug that we are fixing as fast as possible, many thanks for telling us about it! 

If you click on the coordinates shown in the top left, this will change the values to decimal. It wrongly has a degree sign, please ignore, however, the values shown in ESASky are the correct values, in mas/yr, for the proper motions and errors (these columns are wrongly copying the functionality we have for the RA and DEC columns).

We'll let you know when we've fixed this.

Many thanks and best regards!


Dear Bruno,

I'm happy to report that the team fixed this bug and it's working in the current release of ESASky. 

Many thanks and regards,


Dear pgalindo,

We are happy to announce that all catalogues in VizieR (CDS) can now be queried and shown on the sky in ESASky. This of course includes the IRAS and DENIS catalogues (see below images). For more information, please see this page and video on how to use the new features:

Kind regards,


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Dear Pedro,

The latest release of ESASky allows catalogues to be queried with ADQL (which is based on SQL), via the External Data Centres button. Please note, the catalogues in ESASky can also be queried with ADQL if you select the ESASky TAP, and this new feature also includes all tables in VizieR. I wonder if this now meets your needs for an SQL-like filtering capability? 

Please see this page and the video for details on how to query catalogues with ADQL:

Best regards,