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.

Missions to Saturn


Mission Country Launch Date Arrival Date Type Encounter Characteristics

Pioneer 11 USA April 6, 1973 September 1, 1979 Flyby Transmitted low-resolution images and other data about Saturn.
Discovered additional rings and moons not previously known
Voyager 1 USA September 5, 1977 November 13, 1980 Flyby 900 images of Saturn's moons
Major discoveries were the unexpected complexity of the rings and the true nature of Titan's atmosphere.
Voyager 2 USA August 20, 1977 August 26, 1981 Flyby 1150 images of Saturn's moons
Had a scan platform malfunction, yet virtually all objectives were met.
Cassini USA, ESA, Italy October 13, 1997 July 1, 2004 Orbiter/Atmospheric probe 12 science experiments will help scientists understand Saturn's moons, rings, atmosphere, and magnetosphere.
Huygens, an atmospheric probe carried aboard Cassini, will parachute through Titan's atmosphere.

An Overview of Space Exploration

Last modified January 12, 2005 by Randy Russell.

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