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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids

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Science news and information about the Sun-Earth environment.

SPACE WEATHER
Current
Conditions

Solar Wind
speed: 348.4 km/s
density:
8.0 protons/cm3
explanation | more data
Updated: Today at 2243 UT


X-ray Solar Flares

6-hr max:
B1 1930 UT Sep10
24-hr: B6 0720 UT Sep10
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 10 Sep '06

These sunspots pose no threat for strong solar flares. Credit:
SOHO/MDI

Sunspot Number: 51
What is the sunspot number?
Updated: 09 Sep 2006

Far Side of the Sun

This holographic image reveals one possibly-large sunspot on the far side of the sun. Image credit: SOHO/MDI

Interplanetary Mag. Field
Btotal: 10.2 nT
Bz:
1.4 nT south
explanation | more data
Updated: Today at 2246 UT

Coronal Holes:

There are no large coronal holes on the Earth-facing side of the sun today. Credit: NOAA GOES-13.


SPACE WEATHER
NOAA
Forecasts

Solar Flares: Probabilities for a medium-sized (M-class) or a major (X-class) solar flare during the next 24/48 hours are tabulated below.
Updated at 2006 Sep 10 2203 UTC
FLARE 0-24 hr 24-48 hr
CLASS M 05 % 05 %
CLASS X 01 % 01 %

Geomagnetic Storms: Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at 2006 Sep 10 2203 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 15 % 15 %
MINOR 05 % 05 %
SEVERE 01 % 01 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 20 % 20 %
MINOR 10 % 10 %
SEVERE 01 % 01 %

What's Up in Space -- 10 Sep 2006
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The space shuttle is in orbit. We can call you when it's about to fly over your hometown: Spaceweather PHONE.

ZUBENELGENUBI: Just saying it will make you smile: "Zubenelgenubi" (zoo-BEN-al-je-NEW-bee). This funny-sounding word is the name of a double star in the constellation Libra. Tonight Zubenelgenubi is eye-catchingly close to Jupiter. Look southwest just after sunset: sky map.

SUNDAY PUZZLE: Can you guess what this is? Look carefully, then read on.... (continued below)

It's sunspot 904 partially eclipsed by a contrail. Howard Eskildsen of Ocala, Florida, took the picture yesterday. "A jet passed directly through the field of view and left its contrail seconds before the shutter released," he explains. It just goes to show, you never know what might happen when you look at the sun.

SHUTTLE LAUNCH: Space shuttle Atlantis blasted off from Kennedy Space Center yesterday at 11:15 am EDT. High above Earth, NOAA's GOES-12 satellite was looking down on Florida at the moment of launch and photographed the shuttle's exhaust:


Animations: visible, infrared.

Atlantis is on an 11-day mission to visit and expand the International Space Station (ISS). The shuttle's payload bay contains a 35,000-lb truss. Spacewalking astronauts will install the truss on the ISS, then unfold a new set of solar panels spanning 240 feet from tip to tip. These additions will increase the surface area of the station, making it easier than ever to see in the night sky.

Editor's note: Thank you, Jeff Umbarger of Plano, Texas, for bringing the GOES-12 image to our attention.

Sept 7th Lunar Eclipse Gallery
UPDATED Sept. 9, 2006



Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet, although astronomers are finding new ones all the time.

On 10 Sep 2006 there were 803 known Potentially
Hazardous Asteroids

Aug-Sept 2006 Earth-asteroid encounters
ASTEROID

 DATE
(UT)

MISS DISTANCE

MAG.

 SIZE
2006 QM111

Aug 31

0.4 LD

21

13 m
2006 QQ56

Sept. 2

7.9 LD

18

29 m
2006 QV89

Sept. 5

7.9 LD

18

40 m
Notes: LD is a "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach.

Essential Web Links

NOAA Space Environment Center -- The official U.S. government bureau for real-time monitoring of solar and geophysical events, research in solar-terrestrial physics, and forecasting solar and geophysical disturbances.

Atmospheric Optics -- the first place to look for information about sundogs, pillars, rainbows and related phenomena. See also Snow Crystals.

Solar and Heliospheric Observatory -- Realtime and archival images of the Sun from SOHO. (European Mirror Site)

Daily Sunspot Summaries -- from the NOAA Space Environment Center.

Current Solar Images --a gallery of up-to-date solar pictures from the National Solar Data Analysis Center at the Goddard Space Flight Center. See also the GOES-12 Solar X-ray Imager.

Recent Solar Events -- a nice summary of current solar conditions from lmsal.com.

List of Potentially Hazardous Asteroids -- from the Harvard Minor Planet Center.

Observable Comets -- from the Harvard Minor Planet Center.

What is the Interplanetary Magnetic Field? -- A lucid answer from the University of Michigan. See also the Anatomy of Earth's Magnetosphere.

Real-time Solar Wind Data -- from NASA's ACE spacecraft. How powerful are solar wind gusts? Read this story from Science@NASA.

More Real-time Solar Wind Data -- from the Solar and Heliospheric Observatory Proton Monitor.

Lists of Coronal Mass Ejections -- from 1998 to 2001

Mirages: Mirages in Finland; An Introduction to Mirages;

NOAA Solar Flare and Sunspot Data: 1996, 1997, 1998, 1999; 2000; 2001; 2002; 2003; 2004; 2005; Jan-Mar 2006;

Space Audio Streams: (University of Florida) 20 MHz radio emissions from Jupiter: #1, #2, #3, #4; (NASA/Marshall) INSPIRE: #1; (Stan Nelson of Roswell, New Mexico) meteor radar: #1, #2;

Recent International Astronomical Union Circulars

GLOSSARY | SPACE WEATHER TUTORIAL

This site is penned daily by Dr. Tony Phillips: email


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