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Our extensive library of articles, sorted by topic. Learn about timekeeping, astronomy, the development of calendars, and much more.
The UK is not on Greenwich Mean Time (GMT) all year. During Daylight Saving Time the correct time zone is British Summer Time (BST). more
The definition of a tropical year, also known as a solar year, astronomical year, or equinoctial year, is the time it takes the Earth to complete a full orbit around the Sun, and it is approximately 365.242189 days long. more
Sky watchers have wonderful sights to come in 2016. more
Find out why a totally eclipsed Moon turns a shade of red. more
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