Wednesday, March 12, 2008

Vernal equinox 2008

At 1:48am Eastern Daylight Saving Time, 20 March 2008, Spring will begin. This date and time mark the vernal equinox- equal hours of daylight and darkness that occur twice a year in spring and fall.

For more information on this in Ball State's University Libraries and online:

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" from Phil Plait's Bad Astronomy

"The Equinox" from Wolfram Research

SkyTonight Almanac from Sky & Telescope

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

Monday, March 03, 2008

From the archives: Daylight saving time, Spring 2008

It's that time of year again- we have to reset our clocks to fool ourselves into thinking we've more daylight than we have.

When exactly should we reset our clocks?
2:00am, Sunday, March 9th, 2008. Most people simply reset their clocks before they go to bed on Saturday night.

How do we reset them?
Forward 1 hour
. At 1:59am you will set your clock forward to 3:00am. Through sleight of clock, the 2:00am hour will disappear forever...

For more information: View this previous post.