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Topic: Aurora (astronomy)

	Aurora Page (via CobWeb/3.1 planetlab-1.cs.princeton.edu) (Site not responding. Last check: 2007-10-11)
		The Aurora is a beautiful natural phenomenon, that occurs most often in the Polar regions of Earth, in the form of majestic, colorful, and irregular lights in the night sky.
		The word Aurora Australis refers to the Aurora that occurs in the southern hemisphere (southern lights), whereas Aurora Borealis refers to the Aurora that occurs in the northern hemisphere (northern lights).
		The North American Indians considered the Aurora to be the Gods dancing across the night sky, and the Eskimos in Greenland and the Hudson Bay area thought that the northern light was the kingdom of the dead.
	ph99.bc.edu.cob-web.org:8888 /grad/Tomek/Auroral_Homepage/Aurora.html (2372 words)

	Aurora (astronomy) - Wikipedia, the free encyclopedia
		The aurora is a common occurrence in the ring-shaped zone.
		As a result the solar wind moves magnetic flux (tubes of magnetic field lines, moving together with their resident plasma) from the day side of Earth to the magnetotail, widening the obstacle it presents to the solar wind flow, and causing it to be squeezed harder.
		The aurora is the overflow of the radiation belt ("leaky bucket theory").
	en.wikipedia.org /wiki/Aurora_(astronomy) (4764 words)

	Northern Hemisphere Enlarged View (Site not responding. Last check: 2007-10-11)
		For example, the presentation gives a guide to the possibility that the aurora is located near a given location in the northern hemisphere under the conditions that existed at the time of the most recent polar satellite pass.
		The process to estimate the hemispheric power, and the level of auroral activity, involves using this normalization factor which takes into account how effective the satellite was in sampling the aurora during its transit over the polar region.
		A large (> 2.0) normalization factor indicates that the transit through the aurora was not very effective and the resulting estimate of auroral activity has a lower confidence.
	www.sec.noaa.gov /pmap/pmapN.html (314 words)

	River Bend Astronomy Club: Aurora (Site not responding. Last check: 2007-10-11)
		Seeing an aurora in the night sky is a rare event for observers in middle latitudes, which includes the St. Louis region where the River Bend Astronomy Club (RBAC) resides.
		In general, a level of 7 usually enables an aurora to be visible in the St. Louis area.
		With respect to the visual representation, the shape and boundary of the aurora is indicated, as well as the intensity.
	riverbendastro.org /aurora.html (754 words)

	Curious About Astronomy? The Earth
		Auroras are formed when charged particles streaming from the sun impact the Earth's magnetic field.
		This picture of the aurora was taken on Oct. 30, 2003 by Brian Kent, one of the Ask the Astronomer team members, at the Hartung-Boothroyd Observatory outside Ithaca.
		Ask an Astronomer is hosted by the Astronomy Department at Cornell University and is produced with PHP and MySQL.
	curious.astro.cornell.edu /earth.php (1430 words)

	Aurora Astronomical Society (Site not responding. Last check: 2007-10-11)
		We are a group in Aurora, Ohio dedicated to the exciting study of Astronomy and observing the wonders of the night sky.
		We are pleased to be members of the new "Night Sky Network" of astronomy clubs dedicated to public outreach and education in Astronomy.
		Public astronomy programs are held throught the year (see the AAS calendar for details).
	groups.msn.com /AuroraAstronomicalSociety (182 words)

	Astronomy - The aurora - Francis Reddy (Site not responding. Last check: 2007-10-11)
		The ghostly glow of an aurora is the visible manifestation of complex interactions between Earth and the Sun.
		An aurora is a sporadic, generally faint, atmospheric phenomenon usually seen in the night sky from locations at high latitudes.
		"During the aurora of September 2, 1859," wrote American researcher Elias Loomis (1811-1889), "the currents of electricity on the telegraph wires were so steady and powerful that, on several lines, the operators succeeded in using them for telegraphic purposes as a substitute for the battery." For a time, messages were transmitted solely on auroral currents.
	www.astronomy.com /asy/default.aspx?c=ss&id=79 (1539 words)

	SurfWax: News, Reviews and Articles On Aurora
		Aurora and Horizon argue their operations are true to the organic spirit and that big farms help bring organic food to the masses...
		Aurora is ESA's programme aimed at the long-term robotic and human exploration of the Solar System, with Mars and the Moon as the main targets...
		The discovery of hundreds of auroras over the past six years comes as a surprise, since Mars does not have the global magnetic field that on Earth is the source of the aurora borealis and the antipodal aurora australis...
	news.surfwax.com /astronomy/files/Aurora_Astronomy.html (4403 words)

	aurora concept from the Astronomy knowledge base (Site not responding. Last check: 2007-10-11)
		The aurora borealis is seen in the north of the Northern hemisphere; the aurora australis in the south of the Southern.
		Aurorae appear about 2 days after a solar flare and reach their peak about 2 years after sunspot maximum.
		aurora australis (3 facts) - an aurora ocurring in the southern hemisphere of the Earth
	www.site.uottawa.ca:4321 /astronomy/aurora.html (182 words)

	Aurora Borealis also known as the Northern Lights - pamelajoy.com
		Aurora Movie - 200K looking directly overhead and was made from 36 2 second exposures on 35mm film.
		Aurora Basics provided by the Poker Flat Research Range, the world's only scientific rocket launching facility owned by a university, located thirty miles north of Fairbanks.
		The Aurorae (Borealis and Australis) the interaction of a stream of particles from the Sun with the Earth's atmosphere including an aurora animation.
	pamelajoy.com /aurora.php (544 words)

	Aurora from above \| Astronomy Blog
		The aurora are caused when charged particles from the Sun hit oxygen and nitrogen atoms in the Earth's atmosphere and cause them to emit light.
		There tends to be more nitrogen than oxygen lower down in the thermosphere (say lower than 150km) and so colours due to nitrogen (red, blue and violet) tend to originate from there.
		The common green colour of aurora (and the only one I've seen) is due to oxygen atoms and occurs from altitudes between 100km and 300km.
	www.strudel.org.uk /blog/astro/000518.shtml (448 words)

	Aurora on Ch4 \| Astronomy Blog
		Although daytime TV isn't a likely place to find good astronomy, there was an excellent segment on the northern lights hidden away in The 100 Hottest Web Searches 2005 today.
		According to MSN search, the 68th most searched for phrase of 2005 (minus 'naughty' words and a few other things) was "Aurora Borealis".
		He then showed us a magnetometer and even a couple of graphs from the Aurora Watch service (20,000 subscribers).
	www.strudel.org.uk /blog/astro/000458.shtml (215 words)

	Southern Sky Watch 2006
		Aurora occur when charged particles from the solar wind enter earths outer atmosphere and interact with the oxygen and nitrogen atoms producing eerie displays of coloured lights.
		Aurora will generally follow solar flares by about 2 days, and a number of instruments are watching the sun for these outbursts.
		This is the old aurora alert list, but with auroras rarer as we approach solar minimum (except for the occasional humdinger, like the August 2005 auroral event), it is doing double duty.
	home.mira.net /~reynella/skywatch/ssky.htm (7417 words)

	AstroImages.org Aurora Images
		Aurorae (or northern lights) are the result of oxygen and nitrogen molecules emitting light as they are excited by electrons traveling along the Earth's magnetic field lines.
		The Aurora is much fainter at this latitude but can sometimes be seen toward the northern horizon.
		Astronomy Resources - Extensive list of astronomy resources on the internet, categorized by subject with descriptions of each site.
	www.astroimages.org /aurora.html (218 words)

	Moon, Planets And Aurora, Oh My! - an Astronomy Net Article
		A rare planetary conjunction, a more rare Aurora (a red one), film in the camera, a good tripod and a kid to share it with.
		A bit of research reveals that most Aurora are green and result from Oxygen ionization while red comes from the ionization of Nitrogen.
		A Rare Aurora in Northern Virginia with all the light pollution from D.C.,
	www.astronomy.net /articles/6 (530 words)

	APOD: 2003 November 13 - Aurora Oklahoma (Site not responding. Last check: 2007-10-11)
		solar activity late last month, aurora did come sweeping down the Oklahoma plains and skywatcher Dave Ewoldt managed to catch up with this photogenic apparition 40 miles northwest of Oklahoma City at about 3am CST on October 29.
		aurora sightings, Ewoldt had spent the evening photographing nighttime views of small towns in the area while keeping an eye toward the north.
		He reports, "I was just about ready to call it a night when the show started.
	antwrp.gsfc.nasa.gov /apod/ap031113.html (189 words)

	Internet Resources for use in Astronomy classes
		While you are there, go to Astro for Kids even if you are not a kid, and look at their imaginative "family portrait" of the solar system.
		Auroras: Paintings in the Sky - This site will show you what auroras look like from space and on Earth, explain how they are created, and show you where they can be found.
		Aurora Watch: UK - This web site allows you to monitor geomagnetic activity in real time, and will let you know when aurora may be visible from the UK Photo Gallery
	www.internet4classrooms.com /astronomy.htm (2220 words)

	Astronomy News
		Astronomy News continually updated from thousands of sources around the net.
		Pluto may be no more than a distant, icy rock in the minds of international scientists who stripped it of planethood.
		Gilbert is set to welcome a new observatory to town this weekend that local astronomy experts say can help fill a major void for Valley residents wanting a public telescope to glimpse millions of stars, the...
	www.topix.net /science/astronomy (618 words)

	Aurora Borealis
		Click here For aurora photos from KAS Member Lee Shelp's web page showing aurora pictures from Maine, NY (Oct 29/30, 2003) and the September 2002 Black Forest Star Party.
		Aurora over Kopernik Observatory on the evening of October 30, 2003, about 7:30 EST.
		Aurora on the evening of October 30, 2003, about 7:30 EST.
	www.kopernik.org /images/archive/aurora03.htm (369 words)

	Aurora Australis camera pic photo image help details Paul Moss Astronomy NZ New Zealand Aurora Australis Shared to the ... (Site not responding. Last check: 2007-10-11)
		Aurora 21 Nov 02 Submitted by: John Burt at Sun Nov 24 12:04:01 2002 UTC >From Bluff, South Island, NZ.
		The most important aspect to seeing an aurora is to stay prepared for extended periods, weeks, months, years.
		For observers in New Zealand at 41 degrees south and further north, the aurora is available a few times a year, and that is reduced by cloud cover.
	www.astronomy.net.nz /auroraaustralis.htm (1685 words)

	Russell's Astronomy, Scotland UK: Images of Eclipses, Aurora, Comets, Meteors, Noctilucent Clouds, Solar System, Deep ... (Site not responding. Last check: 2007-10-11)
		It is also possible that a display could be sufficiently strong to be visible from southern Australia so keep watching the south for glows and shimmering lights.
		The picture above was taken from Doune, southern Scotland, on the 29/10/2003 during an intense auroral storm that filled the entire sky with beautiful, colourful, mobile auroral light.
		The aurora's corona creates the rare "Angel" which is captured over the shoulder of the statue of Sir David Stirling DSO.
	www.russellsastronomy.com (201 words)

	SPACE.com -- SPACE.com Cam: Aurora
		Instruments on board the NOAA Polar-orbiting Operational Environmental Satellite (POES) continually monitor the power flux carried by the protons and electrons that produce aurora in the atmosphere.
		This image shows the current extent and position of auroral activity in the northern hemisphere, based on measurements taken during the most recent polar pass of the NOAA POES satellite.
		The images gives a guide to the possibility that the aurora is located near a given location, activity that may or may not be visible from the surface.
	www.space.com /spacewatch/aurora_cam.html (310 words)

	The Society for Popular Astronomy
		The SPA Aurora Section routinely observes the annual occurrence of the aurora and noctilucent cloud; both phenomena occur on the fringes of space in the Earth's upper-atmosphere.
		Our aim is to train members in the use of standard observing and reporting procedures and to promote a general interest in observational astronomy.
		We are especially pleased to welcome young or novice amateurs, though astronomers of all abilities and age groups regularly contribute to our observing projects.
	www.popastro.com /sections/aurora.htm (174 words)

	Astronomy/Aurora Info (Site not responding. Last check: 2007-10-11)
		The links below are very informative and useful for viewing the Northern Lights and other Astronomy related material.
		When the plots in the chart below go above 5 (red line), there is a good possibility of Aurora storming.
		Below is a graphic using several parameters, when combined will give you a idea if the Aurora is visible in your area.
	home.sprintmail.com /~michaelthalman/photos/aurora.htm (60 words)

	Phil Plait's Bad Astronomy: Bitesize Astronomy
		Aurorae are caused when the Sun acts up a bit, sending waves of high speed particles towards the Earth.
		A dramatic increase in the particle speed from the Sun indicated a massive event, and hours later a shock front of particles washed over the Earth, causing tremendous auroral displays as far south as 38 degrees (north) latitude.
		First, a cloud lit by the Sun after it has set might be red, but wouldn't be red from the west horizon all the way to the east; as you look east, away from the Sun, the cloud should look darker, gray fading to fl.
	www.badastronomy.com /bitesize/aurora_redcloud.html (763 words)

	photographing the aurora - Astronomy.com Forums
		I was looking for advice on how to photograph the aurora with the equipment I have.
		I have a Nikon N60 SLR w/ a Tamaron 28 to 300 zoom lens.
		I have used Fuji film.,I myself didn't really see much differance in pictures.But I take pictures of storms.This is the first year I got into taken pictures of the Northern lights....It's trial and error...
	www.astronomy.com /ASY/CS/forums/249489/ShowPost.aspx (167 words)

	Aurora -- from Eric Weisstein's World of Astronomy
		Aurora -- from Eric Weisstein's World of Astronomy
		The aurora is a shimmering curtain of green and/or red light seen toward the north (in the northern hemisphere).
		It results from electronic excitation of oxygen and nitrogen atoms in the upper atmosphere by charged particles trapped in the magnetosphere.
	scienceworld.wolfram.com /astronomy/Aurora.html (68 words)

	The Nine Planets Glossary
		A similar effect happens in the southern hemisphere where it is known as the aurora australis.
		In astronomy it includes hydrogen, helium, water, ammonia, carbon dioxide and methane.
		Astronomy Unbound, an electronic text has an excellent glossary
	www.seds.org /nineplanets/nineplanets/help.html (4940 words)

	Aurora Alert \| Astronomy Blog
		The UK Sub-Auroral Magnetometer Network, operated by Lancaster University, has issued an amber alert for a possible geomagnetic storm (aurora).
		This agrees with the USAF Space Forecast Centre's planetary K-index plots, so it looks like now might be a good time to see aurora.
		These will presumably be linked to sunspot group 767.
	www.strudel.org.uk /blog/astro/000241.shtml (163 words)

	AstronomyNZ - Home
		StarDate is a 3 day event held annually during the month of January over a weekend - Friday through to Sunday, with as much hands on observing as the weather allows.
		For anyone with an interest in astronomy, StarDate provides opportunities to look through a range of telescopes, listen to a wide range of astronomy related talks and meet a variety of astronomers.
		Stonehenge Aotearoa, a full-scale working adaptation of Stonehenge, is intended to inspire New Zealanders to explore and experience for themselves how technologies of ancient times were used, and still can be used, to give practical and detailed information on the seasons, time and navigation.
	www.phoenix.org.nz (193 words)

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