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Sun

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		A Virtual Tour of the Sun ^Votes:0 The Sun - A Multimedia Tour Choose your language / Kies uw taal: English / Nederlands Awards this site has received Created by Michiel Berger Read More Go to Site


		Big Bear Solar Observatory ^Votes:0 Your browser does not support frames. This website requres frames, JavaScript and Cascading Style Sheet support to operate. The menu system uses a cookie to remember its state. Please use this link to our no-frames page. Read More Go to Site

		BiSON Helioseismology ^Votes:0 Bi rmingham S olar O scillations N etwork BiSON Network Background What's new Publications Data ( new frequencies ) Graduate Study BiSON Members Solar Links Register Contact Webmail B iSON consists of a network of six remote solar observatories monitoring low-degree solar oscillation modes. It is operated by the High Resolution Optical Spectroscopy group of the School of Physics and Astronomy at the University of Birmingham, UK, in collaboration with Sheffield Hallam University, UK. We are funded by the Science and Technology Facilities Council (STFC). The BiSON station in Sutherland, South Africa. News and Interactive... COROT Launch Success The new French-led COROT spacecraft was launched on 2006-12-27. Graduate Research Opportunities to study for a research degree with BiSON. BiSON Weat Read More Go to Site

		Butterflydiagrams of the Sun ^Votes:0 Butterflydiagrams of the Sun Since 1976 I observe the Sun systematicly. With every observation I also count the number of sunspots and do I make an exact positiondrawing. From 1980 this happens with a 90mm/f1300mm refraktor. The drawings are 150 mm in diameter with an accuracy of 99%. This means that the drawaccuracy on the centre of the sundisk is secure within 1 heliographical degree. A computer is used for storing and computing this data. So it's possible to make a butterflydiagram. In a butterflydiagram the average latitude of the leading- and following sunspots from appearing groups of sunspots is shown through the time. It looks like that at the beginning of the solarcycle sunspots are appearing at higher latitudes on the solardisk. When the cycle goes further the sunspots occurs mor Read More Go to Site

		MSFC Solar Physics ^Votes:0 There is a new link to MSFC's Solar Physics website. Please reset your links. Your web browser will take you to the new web site shortly, or click here . Read More Go to Site

		Solar and Heliospheric Observatory Homepage ^Votes:0 November 20, 2007 01:58:46 UT - Mission Day: 4372 - DOY: 324 About us Site Map --> home about gallery data/archive operations publications newsroom classroom community Hot Shots from SOHO SOHO's first officially periodic comet It is nothing new for the Solar and Heliospheric Observatory (SOHO) to discover another comet - it has already found more than 1,350. The latest SOHO comet, discovered by the LASCO coronagraph, is a bit different however, because SOHO had already "discovered" it twice before... read the story » Pick of the Week Geo-effective coronal hole (November 16, 2007) A well-positioned and substantial coronal hole can be seen (right of center) in this mage by SOHO. Coronal holes appear as the dark areas when viewed... more » previous Picks » --> SOHO Exhibit SunWorks (January 1 Read More Go to Site

		Solar Physics Branch Home Page, Naval Research Laboratory ^Votes:0 The Naval Research Laboratory Solar Physics Branch Privacy Policy This is an official U.S. Navy Web Site External Link Disclaimer GREAT SOLAR HELIUM ERUPTION This photograph of the sun was taken using the extreme ultraviolet radiation from ionized helium, 304 Angstom wavelength. It was taken on December 19, 1973 using the Solar Physics Branch's SO82A Spectroheliograph onboard the Skylab ATM . The Solar Physics Branch is part of the Naval Research Laboratory (NRL) Space Science Divison . Researchers in the Solar Physics Branch have been involved in observational and theoretical studies of the solar atmosphere since the early years of the space age. Experiments developed at NRL have flown on NASA missions such as Skylab/ATM (see the picture above), the OSO satellite series, the Space Shuttle Read More Go to Site

		Solar Terrestrial Activity Report ^Votes:0 Solar Terrestrial Activity Report Last major update issued on November 19, 2007 at 06:00 UTC. [ Solar and geomagnetic data - last month (updated daily )] [ Solar wind and electron fluence charts (updated daily ) [ Solar cycles 21-23 (last update October 4, 2007) ] [ Solar cycles 1-20 ] [ Graphical comparison of cycles 21, 22 and 23 (last update October 4, 2007) ] [ Graphical comparison of cycles 2, 10, 13, 17, 20 and 23 (last update October 4, 2007) ] [ Historical solar and geomagnetic data charts 1954-2006 (last update April 5, 2007) ] [ Archived reports (last update October 3, 2007) ] Recent activity The geomagnetic field was quiet on November 18. Solar wind speed ranged between 333 and 430 km/s (average speed was 368 km/s, decreasing 70 km/s from the previous day). Solar flux measured a Read More Go to Site

		Solar Terrestrial Dispatch - Leaders in Space Weather Forecasting Services ^Votes:0 Midnight at the Beach by Dennis Anderson Click image for details or visit the Gallery . Space Weather Specialists 20 November, 2007. Proplab-Pro Version 3 - Release Date Software: Proplab-Pro Version 3 Release Date Advanced Space Weather Information Monitor (SWIM) STD Aurora Monitor Proplab-Pro HF Radio Propagation Laboratory Forecasts/Summaries: AstroAlerts Latest Daily Summary Latest Hourly Indices Impact Predictions Daily Report of Activity Discussions: Discuss Space Weather, Astronomy and Photography Here Professional Services: Power Grid Protection Dedicated Space Weather Prediction Services Courses: Space Weather and Radio Propagation Forecastng Course Auroral Activity: Latest Sightings Submit Your Sighting Daily Summary Real-time Spacecraft Imagery Latest Aurora Watch Latest Aurora Read More Go to Site

		Stanford SOLAR Center ^Votes:0 Search the SOLAR Center: Solar News The Latest Solar Images from SOHO EIT 304 EIT 195 MDI Continuum LASCO C2 Image Credits: SOHO (ESA & NASA) Read the latest information about solar flares, missions, and other recent developments from NASA, SOHO, and MDI. Recent news articles and press releases : 'No Sun Link' to Climate Change - July 10, 2007 - A new scientific study concludes that changes in the Sun's output cannot be causing modern-day climate change. Magnetosphere Changes Used to Detect Molten Rock Layer Deep Below American Southwest - June 21, 2007 Mysteries of Light - June 19, 2007 Screaming CMEs Warn of Radiation Storms - May 29, 2007 More... Featured Pages Global Warming Global climate change -- is it real? How much, if any, is being caused by the Sun? W Read More Go to Site

		Sun Fact Sheet ^Votes:0 Sun Fact Sheet Sun/Earth Comparison Bulk parameters Sun Earth Ratio (Sun/Earth)Mass (10 24 kg) 1,989,100. 5.9736 333,000. GM (x 10 6 km 3 /s 2 ) 132,712. 0.3986 333,000. Volume (10 12 km 3 ) 1,412,000. 1.083 1,304,000. Volumetric mean radius (km) 696,000. 6371. 109.2Mean density (kg/m 3 ) 1408. 5515. 0.255 Surface gravity (eq.) (m/s 2 ) 274.0 9.78 28.0 Escape velocity (km/s) 617.6 11.19 55.2 Ellipticity 0.00005 0.0034 0.015Moment of inertia (I/MR 2 ) 0.059 0.3308 0.178 Visual magnitude V(1,0) -26.74 -3.86 - Absolute magnitude +4.83Luminosity (10 24 J/s) 384.6Mass conversion rate (10 6 kg/s) 4300. Mean energy production (10 -3 J/kg) 0.1937Surface emission (10 6 J/m 2 s) 63.29Spectral type G2 V Model values at center of Sun:Central pressure: 2.477 x 10 11 bar Central temperature: 1.5 Read More Go to Site

		The Sun ^Votes:0 The Sun Sol Hardcopy The New Solar System Summarizes what we've learned from interplanetary explorations in the last 25 years. My primary reference for The Nine Planets . The Compact NASA Atlas of the Solar System This 'road map' of the solar system is the definitive guide for planetary science. Our Sun is a normal main-sequence G2 star, one of more than 100 billion stars in our galaxy. diameter : 1,390,000 km . mass : 1.989e30 kg temperature : 5800 K (surface) 15,600,000 K (core) The Sun is by far the largest object in the solar system. It contains more than 99.8% of the total mass of the Solar System ( Jupiter contains most of the rest). It is often said that the Sun is an "ordinary" star. That's true in the sense that there are many others similar to it. But there are many more smaller Read More Go to Site

		YPOP Home page ^Votes:0 Yohkoh Public Outreach Project ---> ---> Welcome to the Yohkoh Movie Theater! T he Yohkoh Movie Theater ( YPOP ) is designed to bring you images and movies depicting our nearest star, the Sun, as seen by an X-ray telescope that was carried on board the Yohkoh satellite. The YPOP site includes a range of activities for youngsters, parents, teachers and anyone interested in learning more about the Sun. You can make your own movies, see solar images, take a tour of the Sun and much much more. This is a public domain site. The Yohkoh satellite was an observatory for studying X-rays and gamma-rays from the Sun. Yohkoh was launched from Kagoshima, Japan on August 31, 1991, and was lost on December 14, 2001. In over ten years of observing the Sun (much longer than the proposed mission life) Yohko Read More Go to Site

		YPOP Home page ^Votes:0 Yohkoh Public Outreach Project ---> ---> Welcome to the Yohkoh Movie Theater! T he Yohkoh Movie Theater ( YPOP ) is designed to bring you images and movies depicting our nearest star, the Sun, as seen by an X-ray telescope on board the Yohkoh satellite. The YPOP site includes a range of activities for youngsters, parents, teachers and anyone interested in learning more about the Sun. You can make your own movies, see the latest solar images, take a tour of the Sun and much much more. This is a public domain site. The Yohkoh satellite is an observatory for studying X-rays and gamma-rays from the Sun. Launched from Kagoshima, Japan on August 31, 1991. Yohkoh is a project of the Institute for Space and Astronautical Sciences. The spacecraft was built in Japan and the observing instruments hav Read More Go to Site

		YPOP Tour of the Sun: Surfing for Sunbeams! ^Votes:0 Surfing For Sunbeams! A Hypermedia Tour of Our Sun Provided by the Yohkoh Public Outreach Project Welcome to the Tour of Our Sun ! The following pages will tell you about how scientists are studying our Sun this very minute. There are about eight main pages to this tour with lots of hyperlinks to more technical information. Be sure to watch several of our solar movies - they're really cool!! (If you are not sure your computer can view movies, visit our Movie Test Page to find out.) Along the tour we'll try to answer these questions: What is our Sun anyway? What color is Sunlight? What's our Sun like on the inside? What's the strangest thing about our Sun? Does our Sun spin like Earth does? Does our Sun always look the same? How can I learn more about our Sun? (Includes a link to a glossary Read More Go to Site

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