Solar wind
speed: 625.41 km/sec
density: 1.54 protons/cm3
more data: ACE, SOLAR-1
Updated: Today at 1026 UT
X-ray Solar Flares
6-hr max: B9
1629 UT Jul10
24-hr: C6
1459 UT Jul10
explanation | more data
Updated: Today at: 2230 UT
Daily Sun: 10 Jul 26
Expand: labels | no labels
New sunspot 4485 has a 'beta-gamma' magnetic field that poses a threat for M-class solar flares. Credit: NASA/SDO

Sunspot number: 77
What is the sunspot number?
Updated 10 Jul 2026
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 2.33 quiet
24-hr max: Kp= 3.67
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 4.95 nT
Bz: -2.69 nT south
more data: ACE, DSCOVR
Updated: Today at 1025 UT
Coronal Holes: 10 Jul 26

Earth is inside a stream of solar wind flowing from this coronal hole. .
Credit: NASA/SDO | more data

Spotless Days
Current Stretch: 0 days
2026 total: 3 days (2%)
2025 total: 0 days (0%)
2024 total: 0 days (0%)
2023 total: 0 days (0%)
2022 total: 1 day (<1%)
2021 total: 64 days (18%)
2020 total: 208 days (57%)
2019 total: 281 days (77%)
2018 total: 221 days (61%)
2017 total: 104 days (28%)
2016 total: 32 days (9%)
2015 total: 0 days (0%)
2014 total: 1 day (<1%)
2013 total: 0 days (0%)
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
2008 total: 268 days (73%)
2007 total: 152 days (42%)
2006 total: 70 days (19%)

Updated 10 Jul 2026


Thermosphere Climate Index
today: 16.64x1010 W Neutral
Max: 49.4
x1010 W Hot (10/1957)
Min: 2.05
x1010 W Cold (02/2009)
explanation | more data: gfx, txt
Updated 09 Jul 2026

The Radio Sun
10.7 cm flux: 110 sfu
explanation | more data
Updated 10 Jul 2026


SPACE WEATHER
NOAA Forecasts
Updated at: 2026 Jul 10 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
30 %
30 %
CLASS X
10 %
10 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2026 Jul 10 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
35 %
MINOR
05 %
10 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
15 %
20 %
SEVERE
10 %
35 %
 
Friday, Jul. 10, 2026
What's up in space
       
 

This is an AI Free Zone: AI is everywhere -- except here. Spaceweather.com is written by Dr. Tony Phillips, a carbon-based lifeform with 30 yrs of forecasting experience. If you find a mistake, rest assured it was made by a real human being.

 

WANTED--PHOTOS THE CHINESE SPACE STATION: This month, China's Tiangong space station is making a series of bright passes over the United States and Europe. It's easy to see in the night sky if you know when to look. Tiangong flyby alerts are available here. If you see the growing space station, please take its picture and submit your photos to our gallery.

SUNRISE JELLYFISH AND PAYLOAD FAIRINGS: Just before daybreak on Thursday, July 9th, SpaceX launched a Falcon 9 rocket from Cape Canaveral. Minutes later, the second stage passed over Raleigh, North Carolina, where Jeremy Gilchrist photographed a lovely "sunrise jellyfish":

Gilchrist photographed the display from a drone hovering above the morning fog. At the time, the rocket engines were spewing water vapor into near-space 143 to 152 km high. Water molecules rapidly crystalized into an expanding cloud of ice--the "jellyfish"--illuminated by the rays of the high-altitude sun.

"The jellyfish in the dawn sky was quite a sight in North Carolina!" he says.

He also caught something very rare--the rocket's payload fairings. Take a look.

Payload fairings are the two clamshell halves of the rocket's nose cone. They shield the payload (in this case, 29 Starlink satellites) from onrushing air during the climb through the atmosphere. They split away once the air is too thin to matter, at roughly T+3 minutes and 110 km up.

Catching them in a photograph from the ground, as Jeremy did, is remarkable. They're only about 13 meters long, unlit, and hundreds of kilometers away. Well done, Jeremy!

Realtime Space Weather Photo Gallery
Free:
Space Weather Newsletter

THE 18K GOLD 'METEOR CRATER' PENDANT: Have you heard of Moissanite? It's a very rare mineral discovered by 19th-century chemist Henri Moissan in Arizona's Meteor Crater. At first, he thought it was diamond, but later realized it was even more rare. It's a diamond mimic that, until the 1950s, was found naturally only in meteorites.

On May. 29, 2025, the students of Earth to Sky Calculus launched this Moissanite pendant to the stratosphere onboard a cosmic ray research balloon:

You can have it for $199.95. Engraved with the words "I love you always and forever", this 18K gold-plated sterling silver pendant has a heart-shaped ruby crystal in the middle surrounded by a heart-shaped ring of glittering 5A cubic zirconia nuggets..

The students are selling space pendants to pay the helium bill for their cosmic ray ballooning program. Each one comes with a greeting card showing the jewelry in flight and telling the story of its trip to the stratosphere and back again.

Far Out Gifts: Earth to Sky Store
All sales support hands-on STEM education


Realtime Aurora Photo Gallery
Free:
Spaceweather.com Newsletter


Realtime Space Weather Photo Gallery
Free:
Space Weather Newsletter

  All Sky Fireball Network
Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA's Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth's atmosphere and many other characteristics. Daily results are presented here on Spaceweather.com.

On July 10, 2026, the network reported 17 fireballs.
(17 sporadics)

In this diagram of the inner solar system, all of the fireball orbits intersect at a single point--Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). [Larger image] [movies]

  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 July 10, 2026 there were 2349 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2026 MP3
2026-Jul-05
10.9 LD
18.1
46
2023 YO1
2026-Jul-05
6.5 LD
2.7
23
2026 NX
2026-Jul-06
0.7 LD
7.9
8
2026 NP
2026-Jul-06
0.2 LD
13
13
2026 NS
2026-Jul-06
2.6 LD
9.6
17
2026 NA
2026-Jul-07
9.9 LD
9.8
43
2026 NC
2026-Jul-07
3.9 LD
14.2
23
2026 NZ
2026-Jul-07
3.2 LD
15.8
16
2026 NN
2026-Jul-08
6.5 LD
12.8
17
2026 MO1
2026-Jul-08
5.9 LD
9.4
30
2026 NT
2026-Jul-10
9.4 LD
7.4
16
2026 MQ1
2026-Jul-10
11.9 LD
10.4
47
2026 NH
2026-Jul-10
5.4 LD
13.3
25
2026 ND1
2026-Jul-11
9.3 LD
7
21
2007 AA2
2026-Jul-12
8.1 LD
6.7
43
2026 MQ3
2026-Jul-16
12.5 LD
8.6
143
2025 PN7
2026-Jul-17
11.6 LD
2.6
19
2026 NW
2026-Jul-17
17.4 LD
3.1
24
2026 NF
2026-Jul-18
10.9 LD
8.6
23
2026 NO
2026-Jul-18
11 LD
15.4
68
2025 MB90
2026-Jul-19
5 LD
9.6
54
2026 NB1
2026-Jul-21
17.7 LD
8.4
81
2020 OM
2026-Jul-21
9.1 LD
9.5
15
2026 KU3
2026-Jul-24
7.7 LD
8.6
80
2020 UR1
2026-Jul-25
18.8 LD
7.6
28
2015 BF
2026-Jul-26
17.3 LD
12.5
17
2025 OW
2026-Jul-30
16.1 LD
20.1
70
2024 RM10
2026-Aug-05
13.6 LD
7.5
24
173561
2026-Aug-09
13.1 LD
16.2
756
2019 NY2
2026-Aug-10
6.6 LD
9.6
195
2016 BV14
2026-Aug-10
19.1 LD
21.1
162
2013 QC11
2026-Aug-13
14.5 LD
19
172
2026 NY
2026-Aug-14
12.4 LD
8.2
102
2025 AL2
2026-Aug-16
2.2 LD
12.4
100
2025 DU7
2026-Aug-19
8.7 LD
2.9
5
2025 FY11
2026-Aug-20
19.2 LD
3.5
6
2023 RL
2026-Aug-25
12.9 LD
4.8
7
523609
2026-Aug-27
18.5 LD
22.7
441
2025 QM9
2026-Aug-28
15.2 LD
11.1
20
221455
2026-Aug-28
9.4 LD
19
443
2017 BP31
2026-Aug-28
11.2 LD
20.5
382
2007 EK
2026-Aug-30
10.9 LD
9.1
5
2017 RH16
2026-Aug-31
8.7 LD
12.1
21
2025 CL3
2026-Sep-01
9.6 LD
13.5
30
2018 RD2
2026-Sep-01
19.5 LD
9.6
14
2025 QV5
2026-Sep-02
14.2 LD
7.3
12
2020 YA5
2026-Sep-06
19.5 LD
10.4
47
2022 RK
2026-Sep-06
13.7 LD
8.6
24
Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU.
  Cosmic Rays in the Atmosphere

SPACE WEATHER BALLOON DATA: Almost once a week, Spaceweather.com and the students of Earth to Sky Calculus fly space weather balloons to the stratosphere over California. These balloons are equipped with sensors that detect secondary cosmic rays, a form of radiation from space that can penetrate all the way down to Earth's surface. Our monitoring program has been underway without interruption for 10 years, resulting in a unique dataset of in situ atmospheric measurements.

Latest results (Nov. 2024): Atmospheric radiation is sharply decreasing in 2024. Our latest measurements in November registered a 10-year low:

What's going on? Ironically, the radiation drop is caused by increasing solar activity. Solar Cycle 25 has roared to life faster than forecasters expected. The sun's strengthening and increasingly tangled magnetic field repels cosmic rays from deep space. In addition, solar coronal mass ejections (CMEs) sweep aside cosmic rays, causing sharp reductions called "Forbush Decreases." The two effects blend together to bring daily radiation levels down.

.Who cares? Cosmic rays are a surprisingly "down to Earth" form of space weather. They can alter the chemistry of the atmosphere, trigger lightning, and penetrate commercial airplanes. According to a study from the Harvard T.H. Chan school of public health, crews of aircraft have higher rates of cancer than the general population. The researchers listed cosmic rays, irregular sleep habits, and chemical contaminants as leading risk factors. A number of controversial studies (#1, #2, #3, #4) go even further, linking cosmic rays with cardiac arrhythmias and sudden cardiac death.

Technical notes: The radiation sensors onboard our helium balloons detect X-rays and gamma-rays in the energy range 10 keV to 20 MeV. These energies span the range of medical X-ray machines and airport security scanners.

Data points in the graph labeled "Stratospheric Radiation" correspond to the peak of the Regener-Pfotzer maximum, which lies about 67,000 feet above central California. When cosmic rays crash into Earth's atmosphere, they produce a spray of secondary particles that is most intense at the entrance to the stratosphere. Physicists Eric Regener and Georg Pfotzer discovered the maximum using balloons in the 1930s and it is what we are measuring today.

  Essential web links
NOAA Space Weather Prediction Center
  The official U.S. government space weather bureau
Atmospheric Optics
  The first place to look for information about sundogs, pillars, rainbows and related phenomena.
Solar Dynamics Observatory
  Researchers call it a "Hubble for the sun." SDO is the most advanced solar observatory ever.
STEREO
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Solar and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
SolarMonitor.org
  information about sunspots based on the latest NOAA/USAF Active Region Summary
Starlink Satellite Statistics
  current counts of failed and deployed Starlink satellites from Jonathan's Space Page. See also, all satellite statistics.
The Aerospace Corporation
  Authoritative predictions of space junk and satellite re-entries
Daily Sunspot Summaries
  from the NOAA Space Environment Center
NOAA 27-Day Space Weather Forecasts
  fun to read, but should be taken with a grain of salt! Forecasts looking ahead more than a few days are often wrong.
Aurora 30 min forecast
  from the NOAA Space Environment Center
Live Aurora Webcam
  from Lights over Lapland
Heliophysics
  the underlying science of space weather

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T CrB NOVA WATCH
today: m=10.3 (Jul 10.2)
yesterday: m=9.9

AAVSO data: #1, #2.

Explanation: When the nova explodes, the visual magnitude of the star will jump from +10 (invisible to the naked eye) to +2 (about as bright as the North Star).


Starlink Statistics
Total Launched: 12,472
In orbit:
10,777
Updated: 09 Jul 2026

Starlink Re-entries (2026)
January: 24
February: 54
March: 48
April: 51
May: 60
June: 35
July: 23
Updated: 09 Jul 2026

Starlink Re-entries (yearly)
2020 total: 46
2021 total: 78
2022 total: 100
2023 total: 88
2024 total: 308
2025 total: 657
2026 total: 274 so far

Updated: 09 Jul 2026


Data sources: #1, #2, #3; Histograms: launches, reentries







space weather alerts



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