A few years ago, I lost my passport two days before a big, international trip. Getting a new passport expedited would cost hundreds of dollars. And I wasn’t sure if it would even arrive in time. You ...

GIMP is a free open-source graphic software that is good for photo editing, photo manipulation, tracing, and much more. Learning how to trace images and objects in GIMP is a way to get your hand-drawn ...

Upload astronomical images to Astrometry.net to identify objects. Use SIMBAD to find object properties and links to other databases. Explore Aladin to visualize and investigate surrounding objects.

Learn how to get the most out of your binoculars and improve your stargazing experience with our easy-to-follow guide. When you purchase through links on our site, we may earn an affiliate commission.

Searches for dark matter particles have come up empty so far, driving theorists to get more creative with their ideas.

Updated September 8, 2025 at 10:31 AM EDT This story was originally published on Oct. 31, 2024, and has been updated. A few years ago, I lost my passport two days before a big, international trip.

We asked visual search scientists, a metal-detecting enthusiast and a detective to share the most effective strategies to find missing objects. This story was originally published on Oct. 31, 2024, ...