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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 299.4 km/sec
density: 2.5 protons/cm3
explanation | more data
Updated: Today at 2247 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Sep11
24-hr: A0
2245 UT Sep11
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 11 Sep 07
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 11 Sep 2007
Far side of the Sun:
This holographic image reveals no sunspots on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Sep 11 2120 UT
Interplanetary Mag. Field
Btotal: 5.1 nT
Bz: 1 nT south
explanation | more data
Updated: Today at 2247 UT
Coronal Holes:
A minor solar wind stream flowing from the indicated coronal hole should reach Earth on or about Sept. 14th. Credit: SOHO Extreme Ultraviolet Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Sep 11 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: 2007 Sep 11 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
What's up in Space
September 11, 2007
Where's Saturn? Is that a UFO--or the ISS? What's the name of that star? Get the answers from mySKY--a fun new astronomy helper from Meade. .

SPACE WEATHER WORKSHOP: Researchers are converging on Boulder, Colorado, this week for a major scientific workshop on solar physics and space weather forecasting. Topics range from explosions on the sun to magnetic storms on Earth--and everything in between. Stay tuned for highlights.

PARTIAL ECLIPSE--TODAY! This morning in a remote stretch of ocean between Tierra del Fuego and Antarctica (map), the moon eclipsed 75% of the sun. A lesser but still beautiful eclipse was visible across the southern half of South America. In Peru, Jan Hattenbach caught the partial sun rising over the slopes of the Pichu Pichu volcano:

The next partial eclipse: Feb. 7, 2008. Book your tickets to Antarctica!

more images: from Samuel Leite Guimarães of Uberlândia, Brazil; from Erwin Sandoval Vargas of Coyhaique, Chile; from Guilherme Grassmann of Americana, Brasil;

MORNING STAR: Venus has returned to the morning sky and it is truly impressive beaming through the rosy glow of dawn. The planet is so bright, it remains visible even after the sun rises in full--hence the blue sky in this photo submitted by Chris Schur of Payson, Arizona:

Schur spotted Venus after sunrise and "the opportunity to image it was irresistable," he says. "I took the photo using my 12.5 inch telescope just as Venus was clearing the treetops at 9:30 a.m."

Venus seems to be grinning at us. That's because, like the Moon, Venus has phases and at the moment it is a slender, smiling crescent. Wake up early, look east, and you may find yourself smiling back: sky map.


September 2007 Aurora Gallery
[August 2007 Aurora Gallery] [Night-sky Cameras]

Near-Earth Asteroids
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 September 11, 2007 there were 881 potentially hazardous asteroids.
Sept. 2007 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2007 RF1
Sep. 2
8.5 LD
18
26 m
2007 RS1
Sep. 5
0.2 LD
17
3 m
2007 RJ1
Sep. 16
2.5 LD
16
40 m
Notes: LD means "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 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.
Daily Sunspot Summaries
  From the NOAA Space Environment Center
Current Solar Images
  from the National Solar Data Analysis Center
  more links...
©2007, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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