astronomy.today uses only what it needs to work, plus a little optional storage that remembers your preferences. There is no analytics, tracking or advertising, and nothing is shared with third parties for those purposes.
You can change your choice at any time:
Strictly necessary — required for sign-in, security and to remember your consent. These cannot be turned off.
Preferences — functional browser storage that remembers conveniences. Turn it off in Cookie settings and the site simply won’t save them.
| Name | Type | Category | Purpose | Duration |
|---|---|---|---|---|
| at_session | Cookie | Strictly necessary | Keeps you signed in and protects forms against CSRF. | Session (until the browser closes) |
| at_remember | Cookie | Strictly necessary | Keeps you signed in between visits — only set if you tick “remember me”. | 30 days |
| at.cookie.consent | Local storage | Strictly necessary | Remembers your cookie choice so you are not asked again. | Until you clear it |
| at_nv | Local storage | Preferences | Remembers night-vision (red) mode. | Until you clear it |
| at.obs.disconnected.* | Local storage | Preferences | Remembers that you disconnected a telescope in the Observatory. | Until you clear it |
| at.obs.panel.* | Local storage | Preferences | Remembers which device panel you had open in the Observatory. | Until you clear it |
| at.obs.plan.* | Local storage | Preferences | Remembers the observing plan you selected. | Until you clear it |
* keys ending in * are stored once per equipment profile, with the profile’s id in place of the star.
The site loads fonts and a few libraries from public CDNs (jsDelivr and Google Fonts). These set no cookies here, but, like any web request, the provider may see your IP address to deliver the file. We do not embed analytics, social widgets or ad networks.
Use the <em>Cookie settings</em> button above to change the Preferences category. You can also clear cookies and site data from your browser’s settings at any time — signing out will end the session, and clearing storage removes the preferences listed here.
See also our Privacy Policy.
Last updated: October 2026