Gaia in the UK

Taking the Galactic Census


Amateur astronomers


On this page you can find the list of recent Gaia Alerts which are suitable for observing with a small telescope.

Gaia in space


Discover how to observe Gaia Alerts yourself or with your school.

Gaia rogues gallery


Find out more about the people and organisations behind Gaia and the Alerts.

SNIa: artist's impression

What and Why

What are Gaia Alerts? Why are we looking and what do we hope to find?

Gaia liftoff


See some images from the Gaia Alerts project.

Gaia Alerts app. Receive Gaia alerts on your phone or tablet:

Android app soon on Google Play.

The full list of all Gaia Science Photometric Alerts can be found at The full list is also avaialble for download in CSV format from or you can download a copy from Alerts CSV page on this website. The alerts published during the validation phase (before July 2015) are also listed on the Gaia Photometric Science Alerts: Validation Phase page.

Visit Tools page on the gsaweb website for a range of tools.

Status update (1 July 2016): Gaia Alerts have resumed operations after the transition between data segments. We are currently processing the data received so far in segment 3 and will soon publish all alerts from the segment-3 data. Data segment 3 started on 23 May 2016 (see Data Segments and Processing Cycles).