Commenting on or reporting errors in posts

This blog is used by me mainly to report new posts on physicspages.com, (you can sign up to new posts by entering your email in the box on the right) but you can also submit comments and error reports here. To make a comment or error report:

  1. Copy the title and/or the URL of the post you wish to comment on.
  2. Click on the <number> comments link at the end of this post (<number> is the current number of comments and will vary).
  3. If the <number> comments link isn’t visible, scroll to the bottom of the page until you find a ‘Leave a reply’ box.
  4. Scroll to the end of the comments and add your comment there.
  5. If you’re commenting on a particular equation in a post, please make sure you include the equation number in your comment.

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Ellipses

Ellipses

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Angular distances on the celestial sphere

Angular distances on the celestial sphere

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Julian dates

Julian dates

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Astronomical coordinates – declination and right ascension

Astronomical coordinates – declination and right ascension

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Sidereal and synodic periods of planets

Sidereal and synodic periods of planets

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Orthonormal and coordinate bases

Orthonormal and coordinate bases

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Gravitational redshift from the Killing vector

Gravitational redshift from the Killing vector

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Relation between energy and velocity of observer

Relation between energy and velocity of observer

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Conserved quantities from Killing vectors

Conserved quantities from Killing vectors

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Thickness of spherical shell derived from areas

Thickness of spherical shell derived from areas

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