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.

Uranus Statistics

Planetary Symbol: Name in Roman/Greek Mythology: Uranus/Uranus
Diameter: 51,488 km (32,000 miles) Rotation Period about Axis: 17.24 hrs (retrograde?)
Mass: 86.8x10^24 kilograms (14.5 x Earth's) Revolution Period about the Sun: 84 years
Density: 1,270 kg/m^3 Tilt of Axis: 98o (or 82o?)
Minimum Distance from Sun: 2.7 billion km
(1.7 billion miles)
Surface Gravity: 8.69 m/s^2 (0.89 x Earth's)
Maximum Distance from Sun: 3 billion km
(1.87 billion miles)
Temperature at Cloud Tops: -200o C ( -328o F)
Orbital Semimajor Axis: 19.19 AU (Earth=1 AU) Average Cloud Top Temperature (K): 73K
Minimum Distance from Earth: 2.57 billion km
(1.6 billion miles)
Satellites/Rings: known moons, faint rings

Uranus Image Archive

Comparative Planetary Statistics -- in table form

Comparative Orbital Statistics -- in table form

Actual Distance to Earth

Last modified May 5, 2003 by Randy Russell.

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Myths about Uranus

Uranus, which was discovered by William Herschel in 1781, was unknown in ancient times. Astronomers continued the practice of naming planets after deities in Greek and Roman mythology and named this new...more

What are the retrograde motions of planets in the sky?

It depends on which type of motion you are asking about. If you take a birds-eye view from the top of the solar system all the planets orbit around the Sun in a counter-clockwise (or direct) direction....more

Uranus' Moons and Rings

Uranus has // Call the moon count function defined in the document head print_moon_count('uranus'); fascinating moons and a complicated ring system. The ring is a completely different form of ring than...more

How far is the Earth from the Sun, the Moon and all the other planets? How far are all of the planets from the Sun? Do you know of a software that tracks the planets in real-time?

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An Overview of Uranus' Atmosphere

The plain aquamarine face of Uranus confirms the fact that Uranus is covered with clouds. The sameness of the planet's appearance shows that the planet's atmosphere is mostly composed of one thing, methane....more

An Overview of Uranus' Interior

The Giant planets do not have the same layered structure that the earthlike planets do. Their evolution was quite different than that of the earthlike planets, and they have much more gas and ice inside....more

The Poles of Uranus

Uranus is the tilted planet. The axis through its North and South Poles is tilted by 98°. In other words, Uranus is lying on its side! That's not all - the magnetic field of Uranus is tilted, too. The...more

An Overview of Uranus' Atmospheric Evolution

The giant planets have definitely changed since their formation. But how much remains to be seen. Most of the original air of the giant planets remains in place. (The earth-like planets lost most of their...more

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