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.

Mars Statistics

Planetary Symbol: Name in Roman/Greek Mythology: Mars/Ares
Diameter: 6,785 km (4,217 miles) Rotation Period about Axis: 24.6 hrs
Mass: 0.64x10^24 kilograms (0.11 x Earth's) Revolution Period about the Sun: 1.88 years
Density: 3,933 kg/m^3 Tilt of Axis: 25o 12"
Minimum Distance from Sun: 205 million km
(128 million miles)
Surface Gravity: 3.7 m/s^2 (0.37 x Earth's)
Maximum Distance from Sun: 249 million km
(155 million miles)
Temperature: -129o C to 0o C
( -200o F to 32o F)
Orbital Semimajor Axis: 1.52 AU (Earth=1 AU) Average Surface Temperature (K): 218K
Minimum Distance from Earth: 35 million miles Satellites: 2

Mars Image Archive

Comparative Planetary Statistics -- in table form

Comparative Orbital Statistics -- in table form

Actual Distance to Earth

Last modified June 6, 2002 by Jennifer Bergman.

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Mars

Ares was the Greek god of war, was identified with the Roman god, Mars. He always acted like a strong warrior and a strong desire for violence. He enjoyed the great noise of battle, and he loved bloody...more

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