Sulfurous soot circulated the globe for weeks

A Simple Science Project For Sunday Night

canada goose outlet miami What Color Is the Moon? Eclipse canada goose outlet miami

There are many ways to enjoy tomorrow night’s total lunar eclipse. First and foremost is to sit back and take in the slow splendor of the Moon entering and exiting Earth’s colorful shadow. By making canada goose coats your own estimate, you can contribute to atmospheric and climate change science. Credit: Alexandre AmorimThe last few lunar eclipses have been bright with L values of 2 and 3. We won’t know how bright totality will be during the September 27 28 eclipse until we get there, but chances are it will be on the bright side. That’s where you come in.

canada goose outlet phone number On the night of the eclipse, hold thephone right up next to the moon during mid eclipse and estimate its «L» value with your canada goose factory sale naked eye. Send thatnumber and time of observation toDr. Richard Keen at [email For the sake of consistency with Danjon estimates madebefore mobile phones took over the planet, also compare the moon’s color with the written descriptions above before sending your final cheap Canada Goose estimate. canada goose outlet phone number

canada goose outlet 80 off Graph showing the change in heating of the ground in fractions of degrees (vertical axis) as affected by volcanic eruptions and greenhouse warming since 1979. The blue shows volcanic cooling, the red shows greenhouse warming. Notice the rising trend in warming after 1996. canada goose clearance sale Credit: Dr. Richard KeenKeen, an emeritus professor at the University of Colorado Boulder Department of Atmospheric and Oceanic Sciences,has long studiedhowvolcanic eruptionsaffect both the color of the eclipsed moon and the rate of global warming. cheap canada goose uk Every eclipse presents another opportunity to gaugethe current state of the atmosphere and in particular the dustiness of the stratosphere, the layer of air immediately abovethe ground hugging troposphere. Much of the sunlight bent into Earth’s shadow cone (umbra) gets filtered through the stratosphere. canada goose outlet 80 off

canada goose outlet washington dc Volcanoes like Mt. Pinatubo, which erupted in June 1991 in the Philippines, inject tremendous quantities of ash and sulfur compounds high into the atmosphere, where they can temporarily block sunlight and cause a global drop in temperature. Credit: USGSVolcanoes pump sulfur compounds and ash high into the atmosphere and sully the otherwise clean stratosphere with volcanic aerosols. Theseabsorb both light and solar energy, a major reason why eclipses occurringafter a major volcanic eruption can be exceptionally dark with L values of «0» and «1». canada goose outlet washington dc

canada goose outlet in usa The moon was so dark during the December 1982 eclipse that Dr. Keen required a 3 minute long exposure at ISO 160 to capture it. Credit: Richard KeenOne of the darkest in recent times occurred on December 30, 1982 after thespectacular spring eruption of Mexico’sEl Chichonthat hurled some7 to 10 million tonsof ash into the atmosphere. Sulfurous soot circulated the globe for weeks, absorbing sunlight and warming the stratosphere by 7F (4C). The moon grew so ashen black during totality that if you didn’t know where to look, you’d miss it. canada goose outlet in usa

canada goose jacket uk Two photos of Earth’s limb or horizon from orbit at sunset before and after the Mt. Pinatubo eruption. The top view shows a relatively clear atmosphere, taken August 30,1984. The bottom photo was taken canada goose August 8, 1991, less than two months after the eruption. Two dark layers of aerosols between 12 and 15 miles high make distinct boundaries in the atmosphere. Credit: NASAKeen’s research focuses on how the clean, relatively dust free stratosphere of recent years may be related to a rise in the rate of global warming compared to volcano induced declinesprior to 1996. Your simple uk canada goose outlet observation will provide one Canada Goose Outlet more data point toward a better understanding of atmospheric processes and how they relate to climate change. CDT. Selected stars are labeled with their magnitudes. Examine the Moon backwards cheap canada goose through binoculars and find a star it most closely matches to determine its magnitude. If for instance, the Moon looks about halfway in canada goose uk black friday brightness between Hamal and Deneb, then it’s magnitude 1.6. Click to enlarge. Source: StellariumIf you’d like Canada Goose online to do a little more science during the eclipse,Keen suggests examining themoon’s colorjust after the beginning and before the end of totality to determine an ‘L’ value for the outer umbra. You can also determine the moon’s overall brightness or magnitude at mid Canada Goose Coats On Sale eclipse by comparing it buy canada goose jacket to stars of known magnitude. The best way to do that is to reducethe moon down toapproximately star size by looking at it through the wrong end of a pair of 7 10xbinoculars and compare it to the unreduced naked eye stars. Use this link for details on howit’s done along with the map I’ve created that has key stars and their magnitudes. canada goose jacket uk

canada goose shop europe The table below includes eclipse eventsfor four different time zones with emphasis on mid eclipse, the time to make your observation canada goose shop europe.

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