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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: 464.4 km/sec
density: 5.1 protons/cm3
explanation | more data
Updated: Today at 2246 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Feb23
24-hr: A2
0320 UT Feb23
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 23 Feb 08
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 22 Feb 2008
Far side of the Sun:
This holographic image reveals no large sunspots on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Current Auroral Oval:

Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated:
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 3.6 nT
Bz: 2.2 nT north
explanation | more data
Updated: Today at 2247 UT
Coronal Holes:
A solar wind stream flowing from this coronal hole could reach Earth on or about Feb. 28th. Credit: Hinode X-Ray Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2008 Feb 23 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: 2008 Feb 23 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
05 %
05 %
SEVERE
01 %
01 %

What's up in Space
February 23, 2008
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.   mySKY

WEEKEND RINGS: This weekend, Saturn makes its closest approach to Earth (770 million miles) for all of 2008. Look straight up at midnight for the golden planet hanging next to the bright star Regulus. The view through a backyard telescope may take your breath away.

STARS POP OUT: Watching last Wednesday's lunar eclipse, Mike Hollingshead was amazed how "the sky went dark when the Moon entered Earth's shadow." Photographing the event from the bitter cold ("0o F!") of Little Sioux, Iowa, he documented the startling change:

"The first frame looks like day, but it's just strong moonlight. As the eclipse progresses the stars pop out and the ground darkens," he says. "I just love this aspect of lunar eclipses."

"It has always fascinated me how dark it gets and how the shadows change during a lunar eclipse," agrees John E Cordiale who made a similar movie from his backyard observatory in Queensbury, New York. "I used a Nikon D200 to take 30 second exposures. This worked until mid-eclipse when the batteries in the camera stopped working at the 4o F outside temperature."

UPDATED: Lunar Eclipse Gallery
[Interactive World Map of Eclipse Photos]

ABOVE THE STORM: The afternoon sky darkened. Grey clouds billowed to the heavens. Thunder shook the ground and lightning danced overhead. The first droplets of heavy rain were just hitting the ground when the spaceship flew by....

This really happened on Feb. 5th when the International Space Station (ISS) flew over western Africa during an afternoon thunderstorm in Mali:

Orbiting Earth 200 miles high at a speed of 17,000 mph, astronauts took the picture using a Nikon D2Xs peering through one of the space station's many windows. It shows an enormous anvil cloud. Anvil clouds form in the tops of thunderstorms 5 to 10 miles high and consist mainly of ice. They get their anvil shape from the fact that the rising air in thunderstorms expands and spreads out as the air bumps up against the bottom of the stratosphere. There's no new science or meteorology in this photo--just a shot of rare beauty.

More ISS Earth-shots: Sunrise near Tehran; Suburban Dallas at Night; New Zealand Peak; Sands of Sudan; Austrian Alps

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. [comment]
On February 23, 2008 there were 927 potentially hazardous asteroids.
Feb. 2008 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2008 CT1
Feb. 5
0.3 LD
15
13 m
2007 DA
Feb. 12
9.8 LD
18
140 m
2008 CK70
Feb. 15
1.0 LD
16
40 m
4450 Pan
Feb. 19
15.9 LD
13
1.6 km
2002 TD66
Feb. 26
16.7 LD
15
440 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 Weather Prediction 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...
©2008, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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