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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: 333.4 km/s
density:
3.8 protons/cm3
explanation | more data
Updated: Today at 2256 UT


X-ray Solar Flares

6-hr max:
A5 1705 UT Jul26
24-hr: B2 0845 UT Jul26
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 26 Jul '06

Sunspot 901 poses no threat for solar flares. Credit: SOHO/MDI


Sunspot Number: 16
What is the sunspot number?
Updated: 25 Jul 2006

Far Side of the Sun

This holographic image reveals no sunspots on the far side of the sun. Image credit: SOHO/MDI

Interplanetary Mag. Field
Btotal: 3.7 nT
Bz:
0.1 nT north
explanation | more data
Updated: Today at 2257 UT

Coronal Holes:

Earth is entering a solar wind stream flowing from the indicated coronal hole. Credit: SOHO Extreme UV telescope.


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 Jul 26 2203 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 Jul 26 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 % 05 %
SEVERE 01 % 01 %

What's Up in Space -- 26 Jul 2006
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BEWARE THE MARS HOAX: Just when you thought it was safe to read your email, a new Mars Hoax is spreading. The widely circulated message claims "the Red Planet is about to be spectacular. On August 27th, Mars will look as large as the full Moon." Fact: On March 27, 2006, Mars will be on the other side of the solar system, 385 million km from Earth and very dim.

So forget about Mars. If you want to see something truly spectacular on August 27th, look east before dawn for a tight conjunction of Venus and Saturn: sky map. No hoax.

FLIGHT 901: Imagine looking out the window of your spaceship and seeing this:


Image credit: Gary Palmer of Los Angeles.

Photographer Gary Palmer of Los Angeles had just such a vision on July 24th when he photographed sunspot 901. "In my dream, the view was simply breathtaking," he says. To share the spectacle, he combined his photo--"hot off the telescope"--with an older picture of an Apollo 11 bulkhead. Voila! Now boarding flight 901 to the sun....

METEOR SHOWER: The Southern Delta Aquarid meteor shower peaks on July 28th. Go outside before dawn on Friday morning, look south, and you could see a meteor every five minutes or so.


Image credit: Roen Kelly of Astronomy magazine.

No one knows where these meteors come from. They could be remains of a long-dead comet or debris from an asteroid-asteroid collision. Curious fact: There is a debris stream nearly parallel to this one. Earth will pass through it on August 8th, producing the Northern Delta Aquarid meteor shower. It's a mystery, too.



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 26 Jul 2006 there were 796 known Potentially
Hazardous Asteroids

July 2006 Earth-asteroid encounters
ASTEROID

 DATE
(UT)

MISS DISTANCE

MAG.

 SIZE
2004 XP14

Jul 3

1.1 LD

12

600 m
2006 BQ6

Jul 29

14 LD

16

500 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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