Wednesday, June 21, 2017

Summer Solstice 2017

Earth northern hemisphere solstice graphic from WikiCommons
{image from WikiCommons}
21 June 2017 marks the summer solstice- the longest day of the year. There will be approximately 14 hours and 59 minutes of daylight today here in Muncie, Indiana.

This means that the sun appears furthest north in the sky and the time between sunrise and sunset is the greatest providing the most daylight hours for the whole year. For example, sunrise was 6:12 am this morning and sunset will be 9:14 pm. On 21 September, three months from now, sunrise will be 7:28 am and sunset will be 7:40 pm (do your own calculations at the US Naval Observatory)- almost 3 hours more daylight (2 hours, 48 minutes, to be exact).

More information from...

...Ball State's University Libraries
Do keyword searches in CardCat for "vernal," "spring," "autumnal," or "fall" "equinox," or "soltices." You can also type in terms such as "astronomy" or "seasons" for more general information.

You can also find books on this subject and astronomy in general on the shelves under call numbers beginning with Q14 (encyclopedia, dictionaries, glossaries, etc.) or QB63-65 (field guides, star charts, manuals, etc.).

...External Links

"The Egg and the Equinox" and "The Longest Day" from Phil Plait's Bad Astronomy

"Summer Solstice" from Wolfram Research

Earth's Seasons: Equinoxes, Solstices, Perihelion, and Aphelion from the US Naval Observatory

"June Solstice: Longest and Shortest Day of the Year" from Time and Date

"7 Fun Facts About the Summer Solstice" from the Old Farmers' Almanac