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

SpaceWeather.com
Science news and information about the Sun-Earth environment.

SPACE WEATHER
Current
Conditions

Solar Wind
speed: 336.4 km/s
density:
0.7 protons/cm3
explanation | more data
Updated: Today at 2245 UT

X-ray Solar Flares
6-hr max:
A4 1925 UT May12
24-hr: B2 0515 UT May12
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 12 May '07

Sunspot 955 poses no threat for strong solar flares. Credit: SOHO/MDI


Sunspot Number: 24
What is the sunspot number?
Updated: 11 May 2007

Far Side of the Sun

This holographic image reveals no sunspots on the farside of the sun, mage credit: SOHO/MDI

Interplanetary Mag. Field
Btotal: 1.7 nT
Bz:
1.3 nT north
explanation | more data
Updated: Today at 2246 UT

Coronal Holes:

A solar wind stream flowing from the indicated coronal hole will reach Earth on or about May 18th. 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 2007 May 12 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 2007 May 12 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 05 % 05 %
SEVERE 01 % 01 %

What's Up in Space -- 12 May 2007
Subscribe to Space Weather News

What's the name of that star? Where's Saturn? Get the answers from mySKY--a fun new astronomy helper from Meade.

ELASTIC SUNSPOT: Sunspot 955 is growing and changing shape as if it's made of elastic. In fact, it's made of magnetism, and the changes shown in this 3-day movie are caused by a reorganization of the sunspot's underlying magnetic field. Sometimes fast-changing magnetic fields become unstable and explode, but so far that hasn't happened to sunspot 955. Stay tuned.

IT CAME FROM OUTER SPACE: Actually, it probably came from Russia. This dust mite was found in 1996 floating aboard the Russian space station Mir:

To be precise, it was found swimming inside a basketball-sized globule of water, floating unseen behind a service panel in Mir's Kvant-2 module. Swimming along with the dust mite were protozoa, amoeba and many species of bacteria.

All these microorganisms came from Earth, hitchhiking their way to space inside astronauts' luggage, on packages of food and equipment, and even on the astronauts themselves. It turns out that microorganisms thrive onboard spaceships, posing a threat not only to the crew, but also to the spaceship itself. Click here to learn more about this problem and what NASA is doing to prevent it.

GREEN COMET: Comet Lovejoy is not quite bright enough to see with the unaided eye, but the sea-green comet is a lovely sight through backyard telescopes. Using a 6-inch refractor, John Chumack took this picture last night:

"Several little galaxies are visible in the background," notes Chumack. "Look below the comet's tail."

Lovejoy is gliding through the constellation Draco, high in the northern sky after sunset. A great night to find it is May 14th when the comet passes right by the 2nd magnitude star eta Draconis. The star will guide you to the comet. Take a look! Sky maps: May 12, 13, 14, 15.



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 12 May 2007 there were 861 known Potentially
Hazardous Asteroids

April 2007 Earth-asteroid encounters
ASTEROID

 DATE
(UT)

MISS DISTANCE

MAG.

 SIZE
2007 DS84

Apr. 14

16 LD

15

325 m
2007 GU1

Apr. 16

2.1 LD

16

45 m
2007 HA

Apr. 17

6.5 LD

13

300 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.

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 -- from the National Solar Data Analysis Center

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

What is the Magnetosphere?

The Lion Roars -- visit this site to find out what the magnetosphere sounds like.

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

Observable Comets -- from the Harvard Minor Planet Center.

Real-time Solar Wind Data -- from NASA's ACE spacecraft.

How powerful are solar wind gusts? Not very! 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 1996 to 2006

Mirages: Mirages in Finland; An Introduction to Mirages;

NOAA Solar Flare and Sunspot Data: 1994, 1995, 1996, 1997, 1998, 1999; 2000; 2001; 2002; 2003; 2004; 2005; Jan-Mar 2006; Apr-Jun 2006; Jul-Sep 2006; Oct-Dec 2006.

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


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