TwitterACicon86x90vert facebookACicon86x90vert
TV/Radio XFINITY | WOW! | WBBM | WXRT | B96 + Dance | US99 | the Drive 97.1

YoutubeTwitterFacebookArlingtoncardinalYahoo! Google Bing Aol.ArlingtoncardinalTMZ Rotten Tomatoes ET Online Box Office MojoArlingtoncardinal Channel 9 WGN Channel 7 Chicago ABC Channel 5 Chicago NBC Channel 2 Chicago CBS Daily HeraldChicago Tribune Breaking NewsArlingtoncardinal Chicago Gas THE GUIDE

Tetrad: First of Four Consecutive Total Lunar Eclipses Begins Midnight April 14/15 (Tuesday/Wednesday)

Wed April 09 2014 9:05 pm
Share The Cardinal -- Articles (E-Mail, Facebook, Twitter & More) 

CHICAGO BEARS RADIO -- WBBM Newsradio 780 "Traffic on the 8's"

A Tetrad of Lunar Eclipses Starts April 15, 2014.

A series of four lunar eclipses spaced 6 months apart will begin on April 15th, and all of the eclipses will be visible for much of the United States.

The dates are …
April 15, 2014
October 8, 2014
April 4, 2014
September 28, 2015

A tetrad is the term that describes when four total lunar eclipses occur consecutively. They occur in approximately 6-month intervals. There are different types of lunar eclipses — some are partial (a partial shadow crosses the moon), some are penumbral (hardly noticeable because the moon only dims), and a total eclipse when the entire moon is covered by a shadow, but a period of scattered light hits the moon to turn is sunset red or “blood” red. These type of eclipses can arrive in any combination. Sometimes four total eclipses happen consecutively. A period of four total eclipses or a tetrad starts April 15, 2014, but in the Chicago area it actually starts just before midnight on April 14, 2014.

The total eclipse for the Western Hemisphere that begins the Tetrad will begin at 11:53 p.m. CDT April 14, 2014. A darkening on the upper left edge won’t appear until about 12:58 a.m. April 15, 2014 as the earth’s shadow covers the full moon.

At 2:06 a.m. CDT, the eclipse will reach totality, and sunlight that is bent by earth’s atmosphere produces the reddish glow on the moon.

Studying the Eclipse Over the Centuries
Giovanni Schiaparelli discovered that there are eras when tetrads occur frequently, — interrupted by eras when they are rare. This cycle takes about 6 centuries. Antonie Pannekoek (1951) explained this phenomenon and found a period of 591 years. Van den Bergh (1954) found a period of 586 years. This also happens to be an eclipse cycle, but recently Tudor Hughes explained the variation as secular changes in the eccentricity of the Earth’s orbit. The period for occurrence of tetrads is variable and currently is about 565 years.


Close Mars, Lunar Eclipse And Lyrid Meteors – April 2014 Skywatching Video.

You can check the moon phases any time here …

Arlington Heights Chicagoland Weather Today …

Moon Phases for 2014 from NASA Goddard Space Flight Center Scientific Visualization Studio.

Get updates from The Cardinal ALL NEWS FEEDS on Facebook. Just ‘LIKE’ the ‘Arlington Cardinal Page (become a fan of our page). The updates cover all posts and sub-category posts from The Cardinal — You can also limit feeds to specific categories. See all of The Cardinal Facebook fan pages at …

CLEAR SKIES?  Weather Data for Wednesday, April 9th, 2014

Tags: , ,    

IMPORTANT NOTE: All persons referred to as subjects, defendants, offenders or suspects, etc. are presumed to be innocent unless and until proven guilty beyond a reasonable doubt in a court of law.

Try a more powerful search in the box below ... SEARCH BOX PRODUCES RESULTS FOR The Cardinal -- ...
(POWERFUL SEARCH for The Cardinal, which can be expanded on the results page.)

Where background Wikipedia info/photos are used, original work is modified and released under CC-BY-SA.

::: Health, wellness and fitness gifts! ::: Cubs, Sox caps at :::

ARLINGTON HEIGHTS BREAKING NEWS --The Cardinal -- is a breaking news blog with Arlington Heights & Chicagoland emphasis. Early breaking reports may prove to be inaccurate after follow-up investigation, which may or may not be updated in The Cardinal -- For in-depth coverage, please also check the following links for network television, cable news networks and Chicago local media coverage ...

Daily Herald | Daily Herald -- Arlington Heights |
Today's headline videos: FOXNews Video | | Associated Press | The Cardinal
Video LOGO youtube Twitter Arlingtoncards facebook battery status Cardinal Calendar Search Batteries Plus RSS Help ...
All Headlines
crimeblog | fireblog

Comments for
COMMENTS are now available via one or more of our official Facebook pages. Comments no longer appear on the article per se. Please comment on or check the other popular Arlington Cardinal Facebook pages at ...

Anyone having information about serious crime in Arlington Heights should register on and look for the anonymous TIP411 feature, or call Arlington Heights Crime Stoppers at 847-590-STOP (847-590-7867). Callers are guaranteed anonymity and may qualify for a cash reward of up to $1,000. Not a resident of Arlington Heights? Check for availability for your community. | Traffic on Twitter


Weather radar map is provided by

RSS Cardinal Weather Center

  • Current Conditions : 20.8F, Clear - 2:11 PM CST Jan. 21
    Temperature: 20.8°F | Humidity: 60% | Pressure: 30.55in ( Falling) | Conditions: Clear | Wind Direction: NNE | Wind Speed: 0mph
  • Tuesday Night as of Jan. 21 2:02 PM CST
    Tuesday Night - Rain in the evening, then light rain likely and a chance of light snow after midnight. Little or no snow accumulation. Lows in the upper 20s. Southwest winds 10 to 20 mph. Inland, gusts up to 30 mph in the evening. Near the lake, gusts up to 30 mph. Chance of precipitation […]
  • Tonight as of Jan. 21 2:02 PM CST
    Tonight - Partly cloudy. Lows 11 to 15. Southeast winds 10 to 20 mph with gusts up to 30 mph.
  • Tuesday as of Jan. 21 2:02 PM CST
    Tuesday - Slight chance of light freezing rain and light snow in the morning, then light freezing rain, light rain, chance of light snow and light sleet in the afternoon. Little or no snow and sleet accumulation. Ice accumulation up to one tenth of an inch. Blustery. Highs in the mid 30s. South winds 15 […]
  • Winter Weather Advisory - Expires: 6:00 PM CST
    Winter Weather Advisory for Cook County in effect until 6:00 PM CST on January 22, 2019