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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: 509.1 km/s
density:
0.9 protons/cm3
explanation | more data
Updated: Today at 2245 UT


X-ray Solar Flares

6-hr max:
B2 1650 UT Jun10
24-hr: B4 1640 UT Jun10
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 10 Jun '06

The magnetic field of sunspot 892 harbors energy for M-class solar flares. Credit: SOHO/MDI


Sunspot Number: 42
What is the sunspot number?
Updated: 09 Jun 2006

Far Side of the Sun

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

Interplanetary Mag. Field
Btotal: 4.5 nT
Bz:
0.9 nT north
explanation | more data
Updated: Today at 2246 UT

Coronal Holes:

Earth is exiting a solar wind stream flowing from the indicated coronal hole. Credit: GOES-12 Solar X-ray Imager


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 Jun 10 2204 UTC
FLARE 0-24 hr 24-48 hr
CLASS M 01 % 01 %
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 Jun 10 2204 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 25 % 25 %
MINOR 10 % 10 %
SEVERE 05 % 05 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 25 % 25 %
MINOR 10 % 10 %
SEVERE 05 % 05 %

What's Up in Space -- 10 Jun 2006
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CORKSCREW ASTEROID: Tiny asteroid 2004 YN107 has been corkscrewing around Earth for seven years. Today, a close encounter between the asteroid and Earth will send the asteroid away again. Get the full story from Science@NASA.

MERCURY RISING: When the sun goes down tonight, step outside and look west into the sunset. That bright pink "star" shining through the twilight is actually a super-cratered shrinking planet with ice at its poles--in other words, Mercury.


Mercury finder chart courtesy of Astronomy magazine.

Now is a great time to see Mercury. The planet rises high in the evening sky every night in mid-June. If you have a backyard telescope, point it at Mercury. Mercury has phases and at the moment it looks like a tiny half-Moon.

Mercury images: from Oscar Blanco of La Coruna, Spain; from Dennis Mammana at the Joshua Tree National Park in California;

MORE STRANGE CLOUDS: Another wave of electric-blue noctilucent clouds spread across northern Europe last night. "This is my first sighting of these beautiful clouds," says Alan C. Tough of Elgin, Moray, Scotland. "Well worth the wait!"


Photo credit: Alan C. Tough of Elgin, Scotland

Noctilucent clouds (NLCs) are a mystery. They float through the outer reaches of Earth's atmosphere at the very edge of space. Some scientists think the clouds are seeded by space dust and fed by rocket exhaust. Others suspect they're a sign of global warming. Later this year, NASA plans to launch a satellite named AIM to investigate. Want to see them yourself? Look west after sunset for sinuous, blue-glowing ripples in the sky.

Observing Tips and Photo Gallery



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 Jun 2006 there were 793 known Potentially
Hazardous Asteroids

June-July 2006 Earth-asteroid encounters
ASTEROID

 DATE
(UT)

MISS DISTANCE

MAG.

 SIZE
2004 DC

Jun 3

10 LD

14

600 m
2003 YN107

Jun 10

8.7 LD

18

25 m
2004 XP14

Jul 3

1.1 LD

12

600 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.

SOHO Farside Images of the Sun from SWAN and MDI.

The Latest SOHO Coronagraph Images -- from the Naval Research Lab

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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