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Video credit: Simulating eXtreme Spacetimes
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Usage

Displays the English Wikipedia's current picture of the day (POTD) in a box of no more than 600 pixels wide, without the blurb (explanatory text).

It is also possible to create your own custom POTD layouts, in case the already-existing versions will not look good within your user page design. Mix and match the following components to make your own. This system will only work for POTDs selected beginning January 1, 2007. Be sure to replace [date] with an appropriate date value. For a dynamically updating version, use {{#time:Y-m-d}} (example: {{POTD/{{#time:Y-m-d}}|image}}).

Template Description Renders as
{{POTD/[date]|image}} The name of the image, without the File: prefix BBH gravitational lensing of gw150914.webm
{{POTD/[date]|size}} The size of the image, without the trailing px 399
{{POTD/[date]|caption}} The image caption (blurb) A binary black hole is a system consisting of two black holes in close orbit around each other. For many years, proving the existence of such binaries was made difficult because of the nature of black holes themselves and the limited means of detection available. However, in the event that a pair of black holes were to merge, an immense amount of energy should be given off as gravitational waves, with distinctive waveforms that can be calculated using general relativity.

This video is a computer simulation of the binary black hole system GW150914 during its final inspiral, merge and ringdown, as it would have been seen by a nearby observer. The star field behind the black holes is heavily distorted and appears to rotate and move, due to extreme gravitational lensing caused by spacetime being warped by the orbiting black holes. This event, observed by LIGO in 2015, was the first observation of a binary black hole merger, as well as the first direct detection of gravitational waves, confirming Einstein's predictions.

{{POTD/[date]|title}} A link to the article the image represents Binary black hole
{{POTD/[date]|texttitle}} A linkless short caption, also useful as an alt attribute Binary black hole

There are two additional predefined layouts:

  • {{POTD/{{#time:Y-m-d}}|column}}: This has the image and caption above each other with no borders. Used on some of the Main Page alternatives and also suitable for user pages.
  • {{POTD/{{#time:Y-m-d}}|row}}: This has the image and caption encapsulated in (usually) a single table row. This is the version used on the current Main Page.

It is also possible to permanently feature a POTD for a selected day. Just add a specific value for the date you want. For example, today's POTD is {{POTD/2019-06-15|image}}. Likewise, you can use date parameters with the other templates as well. If you like the pre-made formats, you can use date parameters there as well, like this: {{Pic of the day|date=2019-06-15}} or {{POTD|date=2019-06-15}}. Again, this system will only work for Pictures of the day selected beginning January 1, 2007.