The original Pixels and Pixel XLs weren't included in Google's November round of security updates.
You won't necessarily have the astrophotography update yet, but if you have one of the Google Pixel models above it should be arriving within the next few days.
The Google Pixel 4 launched with a number of new features, but as is customary for the range some of them are coming to older Pixel models through software updates, and that includes the astrophotography mode, which is rolling out now. For $799 a user may be more willing to overlook the relatively weak battery of the Pixel XL and the lack of the ultra-wide camera, for instance, allowing its strong overall performance, lovely screen and excellent camera performance to shine through.
Google had also previously said it would stop releasing supported Android updates for first generation Pixels after Android Pie, but in March the company said it would extend support through Android Q.
Fixes for a bug that caused some Pixel 3 and Pixel 3a phones to become stuck while booting.
Added features when using an Xbox controller with a Pixel phone through a Bluetooth connection.
The Pixel 4 and 4 XL have been critiqued for both being too expensive in comparison to rival Android phones and at the same time not offering as much in terms of spec value to offset the cost.
Google Pixel 4's astrophotography mode is available as part of the new Google Camera version 7.2.