- Telescope (Wikipedia)
A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. Originally it was an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects – an optical telescope. Nowadays, the word “telescope” is defined as a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors.
- The Essential Meta Tags for Social Media (css-tricks.com)
These days, almost every website encourages visitors to share its pages on social media. […] When users choose to share these links, it is tasked to the web developer to make sure that the associated web pages are properly prepared, which is what we’ll look at now. Facebook and Twitter are, by far, the most popular social media platforms, so let’s focus on those two.
- The Open Graph protocol (ogp.me)
The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to allow any web page to have the same functionality as any other object on Facebook.