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


X-ray Solar Flares

6-hr max:
B7 1940 UT Jun08
24-hr: C2 0625 UT Jun08
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 08 Jun '05

Sunspot 776 is growing and might soon pose a threat for strong solar flares. Credit: SOHO/MDI


Sunspot Number: 94
What is the sunspot number?
Updated: 07 Jun 2005

Far Side of the Sun

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

Interplanetary Mag. Field
Btotal: 3.2 nT
Bz:
1.2 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. Image credit: NOAA 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 2005 Jun 07 2206 UTC
FLARE 0-24 hr 24-48 hr
CLASS M 25 % 25 %
CLASS X 05 % 05 %

Geomagnetic Storms: Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at 2005 Jun 07 2206 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 25 % 25 %
MINOR 15 % 15 %
SEVERE 05 % 05 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 30 % 30 %
MINOR 20 % 20 %
SEVERE 05 % 05 %

What's Up in Space -- 8 Jun 2005
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DAYTIME METEORS: The annual Arietid meteor shower peaks this week on June 7th and 8th. It's a strong shower, but the meteors are difficult to see because the sun is up when the shower is most intense. The Arietids are a rare daytime meteor shower. [more]

Did you miss the aurora storms of May? Next time get a wake-up call: Sign up for SpaceWeather PHONE.

VENUS RETURNS: Have you noticed, lately, a bright pinpoint of light beaming through the rosy glow of sunset? That's Venus, returning to the evening sky after an absence of more than a year.

You can see Venus any evening this month, but tonight is an especially good time to look. The slender crescent Moon is gliding by Venus. The pair are so bright, they pop into view before the sky grows completely dark. [sky map]

Above: Venus and the crescent Moon on June 7th, photographed by Mike O'Leary of El Cajon, California.

more images: from Jan Koeman of Kloetinge, the Netherlands; from Luis Carreira of Leiria, Portugal; from Denis Joye near Paris, France;

SLENDER MOON: On June 6th, the Moon was New, absolutely dark and invisible. Less than 24 hours later, John Stetson of Raymond, Maine, took this picture of its emerging crescent:

"Young moons" like this one are vanishingly slender and glow only faintly against the blue twilight sky. They're not easy to photograph. Nevertheless, Stetson wasn't the only person who did it on June 7th. More images: from Riccardo Di Nasso at Marina di Pisa, Italy; from Pete Lawrence at West Beach, Selsey, UK.



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 are on a collision course with our planet, although astronomers are finding new ones all the time.

On 8 Jun 2005 there were 696 known Potentially
Hazardous Asteroids

May-July 2005 Earth-asteroid encounters
ASTEROID

 DATE (UT)

 MISS DISTANCE

 MAG.
2005 JT1

May 11

6.9 LD

 19
2005 ED318

May 23

6.3 LD

 14
2000 AG6

July 22

8.7 LD

 20
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

The Sun from Earth -- daily images of our star from the Big Bear Solar Observatory

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.

Aurora Forecast --from the University of Alaska's Geophysical Institute

Daily Solar Flare and Sunspot Data -- from the NOAA Space Environment Center.

Lists of Coronal Mass Ejections -- from 1998 to 2001

What is an Iridium flare? See also Photographing Satellites by Brian Webb.

What is an Astronomical Unit, or AU?

Mirages: Mirages in Finland; An Introduction to Mirages;

NOAA Solar Flare and Sunspot Data: 1999; 2000; 2001; 2002; 2003; 2004; Jan-Mar., 2005;

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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