Current Events

  • Irish Chronicles Document Links Between Volcanoes and Weather
    A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong corr...Read more

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    Irish Chronicles Document Links Between Volcanoes and Weather

    A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong correlation between the occurrence of volcanic eruptions and extreme cold weather in Ireland over a 1200 year period. Data analyzed in this study cover the period from 431 to 1649, during which time up to 48 volcanic eruptions are identified in Greenland ice core records through deposition of volcanic sulfate in annual layers of ice. You can find the study (open access), published on 6 June 2013 in IOP Publishing's journal Environmental Research Letters, at http://iopscience.iop.org/1748-9326/8/2/024035/article. Find out more about how volcanoes can influence climate.
  • EF-5 Tornado in El Reno, Oklahoma Widest Ever Recorded in US
    The EF-5 tornado that hit El Reno, Oklahoma on May 31st was the widest ever recorded in the US, acco...Read more

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    EF-5 Tornado in El Reno, Oklahoma Widest Ever Recorded in US

    The EF-5 tornado that hit El Reno, Oklahoma on May 31st was the widest ever recorded in the US, according to the National Weather Service in Norman Oklahoma. The tornado, which remained on the ground for 40 minutes and reached 2.6 miles across (4.2 km), took the lives of 18 people including storm chasers Tim Samaras, Paul Samaras and Carl Young. For more information on the tornado, visit http://ow.ly/i/2hfDG.
  • Atmospheric CO2 Level Tops 400 ppm
    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm rep...Read more

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    Atmospheric CO2 Level Tops 400 ppm

    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For more on the Keeling Curve, see http://keelingcurve.ucsd.edu/. Find out more about greenhouse gases and warming.

Star Statistics

Note: (var) means that the star varies in brightness.
Apparent magnitude: brightness, as seen from Earth; the lower the magnitude, the brighter the star.
The Brightest Stars in the Sky

Name Constellation to which star belongs Apparent Magnitude
Sirius Canis Major -1.46
Canopus Carina -0.72
Rigil Kent (Alpha Centauri) Centaurus -0.27
Arcturus Bootes -0.04
Vega Lyra +0.03
Capella Auriga +0.08
Rigel Orion +0.12
Procyon Canis Minor +0.38
Achernar Eridanus +0.46
Betelgeuse Orion +0.50 (var)

Note: Proxima Centauri is part of the Alpha Centauri system.
Apparent magnitude: brightness, as seen from Earth; the lower the magnitude, the brighter the star.
The Nearest Stars

Star Distance (light-years) Apparent Magnitude
Proxima Centauri 4.2 +11.0
Alpha Centauri 4.3 -0.3
Barnard's Star 6.0 +9.5
Wolf 359 7.7 +13.5
Lalande 21185 8.2 +7.5
UV Ceti 8.4 +12.5
Sirius 8.6 -1.46
Ross 154 9.4 +10.5
Ross 248 10.4 +12.3
Epsilon Eridani 10.8 +3.7
Ross 128 10.9 +11.1

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