Prime Sky is the Royal Observatory’s guide to the night skies. To keep up to date, you can subscribe to our feeds and alerts.

Email (free)

To receive free weekly email alerts telling you what’s happening in the skies above Britain, type your email address below and click the subscribe button.

Email delivered by Google FeedBurner. Your details will not be used for any purpose other than to send you emails about Prime Sky events. You can unsubscribe at any time by following the ‘unsubscribe’ link included in every email.

Text Message (£1 only)

If you want to receive timely reminders about the year’s top-ten astronomical events, you can subscribe to our text-message alerts. You pay just £1 for a full year’s subscription. During the year, we will send you about ten alerts to the glorious must-see events you really do not want to miss.

Text ‘sky’ to 88080 to receive a year’s worth of alerts for £1

This is a one-off payment of £1. You will receive alerts for one year only starting from the time you subscribe. You can expect to receive about ten alerts within the year. No further payments will be taken and you will not be automatically resubscribed for subsequent years. To cancel the alerts at any time, text SKY STOP to 88080.

Web Feed (free)

We publish a free weekly list of astronomical events in the form of a web feed (also known as RSS). Web feeds tell you when websites have added new content; they give you a short summary of the latest information without you having to visit the site. To use a feed you need a piece of software called a feed reader. Your news reader checks the feeds you have subscribed to and lets you read any new information. Learn more about feeds

Subscribe to the free Prime Sky feed

Calendar (free)

To help plan your observations for each coming month, you can pull Prime Sky events into your own Outlook or iCal calendar. Click the link below and then follow the step-by-step instructions that follow.

Subscribe for free to events from your Outlook or iCal calendar

Google Calendar (free)

To help plan your observations for each coming month, you can subscribe to our public Prime Sky calendar in Google. Click the link below to view our public Google Calendar.

Subscribe for free to the Prime Sky public Google Calendar

When you open the Prime Sky calendar in Google, click the ‘add’ button (looks like this: ) in the bottom right-hand corner of the calendar.