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Template:Pic of the day

HR 8799
HR 8799 is a roughly 30-million-year-old main-sequence star located 129 light-years (39.6 parsecs) away from Earth in the constellation of Pegasus. It has roughly 1.5 times the Sun's mass and 4.9 times its luminosity, and is part of a system that also contains a debris disk and at least four massive planets. Those planets, along with Fomalhaut b, were the first exoplanets whose orbital motion was confirmed via direct imaging. The star is a Gamma Doradus variable: its luminosity changes because of non-radial pulsations of its surface. It is also classified as a Lambda Boötis star, which means its surface layers are depleted in iron peak elements.

This video shows the HR 8799 planetary system across a period of seven years, with motion interpolation used on seven images captured between 2009 and 2016 by the W. M. Keck Observatory in Hawaii. The light from the star, in the center, is obscured to allow the four orbiting planets to be seen. From innermost to outermost, the planets are designated e (center right), d (bottom right), c (top right), and b (top left).Video credit: Jason Wang et al.; edited by Benjamin Hunt and Jan-Eric Nyström

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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, with the blurb (explanatory text), for use on user pages. To always display the current day's POTD, use {{Pic of the day}}; to permanently feature a particular day's POTD, use {{Pic of the day|date=[date]}}, where the [date] parameter can be given in any valid format.

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 HR 8799 Orbiting Exoplanets.gif
{{POTD/[date]|size}} The size of the image, without the trailing px 375
{{POTD/[date]|caption}} The image caption (blurb) HR 8799 is a roughly 30-million-year-old main-sequence star located 129 light-years (39.6 parsecs) away from Earth in the constellation of Pegasus. It has roughly 1.5 times the Sun's mass and 4.9 times its luminosity, and is part of a system that also contains a debris disk and at least four massive planets. Those planets, along with Fomalhaut b, were the first exoplanets whose orbital motion was confirmed via direct imaging. The star is a Gamma Doradus variable: its luminosity changes because of non-radial pulsations of its surface. It is also classified as a Lambda Boötis star, which means its surface layers are depleted in iron peak elements.

This video shows the HR 8799 planetary system across a period of seven years, with motion interpolation used on seven images captured between 2009 and 2016 by the W. M. Keck Observatory in Hawaii. The light from the star, in the center, is obscured to allow the four orbiting planets to be seen. From innermost to outermost, the planets are designated e (center right), d (bottom right), c (top right), and b (top left).

{{POTD/[date]|title}} A link to the article the image represents HR 8799
{{POTD/[date]|texttitle}} A linkless short caption, also useful as an alt attribute HR 8799
{{POTD/[date]|credit}} The credit line of the image, including the genre (e.g. photograph, painting) Video credit: Jason Wang et al.; edited by Benjamin Hunt and Jan-Eric Nyström

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/2019-11-13|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=2019-11-13}} or {{POTD|date=2019-11-13}}. Again, this system will only work for POTDs selected beginning January 1, 2007.