Astronomer. Author. Chief Aurora-Chaser at Hurtigruten. Single R; double S. Ta. Books and more in link π
UK
Joined January 2009
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If you've been enjoying the sight of the Northern Lights in the UK tonight, you may be interested in the new edition of my definitive guide to the subject, which is also currently on offer at Amazon! amazon.co.uk/Northern-Lightsβ¦
Tom Kerss FRAS retweeted
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2026 Oct 10 1742 UTC
Valid To: 2026 Oct 10 2359 UTC
Warning Conditions: Onset
Noaa Scale: G3 - Greater
Comment:
Issue Time: 2026 Oct 10 1742 UTC
bit.ly/3wVgAKH
Tom Kerss FRAS retweeted
G1 (Minor) to G2 (Moderate) geomagnetic storms are likely on 09 Oct with the arrival of a CME that was associated with a M1.4 flare from Active Region 4549 on 06 Oct. A high chance for additional M-class flare activity from Region 4549 will persist in the coming days.
ALT G2 (Moderate) Geomagnetic Storm Watch
Tom Kerss FRAS retweeted
Here's our October #shelfie β reviewed in our latest issue!
π ππ¨π«ππ‘ππ«π§ ππ’π π‘ππ¬ @tomkerss
π ππ§ ππ’π¦π @jimalkhalili
π πππ¦ππ¬ ππππβπ¬ ππ§ππ’ππ§π ππ¨π¬π¦π¨π¬ Maggie Aderin & Sarah Wild
π ππ¨π° ππ¨ πππ¬π’π π§ π ππ§π’π―ππ«π¬π @AstroRoyalScot
Tom Kerss FRAS retweeted
Inspector Smile is ready for science! π«‘
This is Smileβs first ultraviolet view showing an auroral substorm.
With the ultraviolet camera now operational, Smile becomes the first spacecraft since 2008 to capture the full ring of northern lights around the north pole in ultraviolet light.
1/4
Tom Kerss FRAS retweeted
Achievement unlocked!
Reward: More years of fuel!
We have completed Roman's first course correction so accurately that it conserved years of fuel for the mission!
Learn more: go.nasa.gov/46qdvRj
Tom Kerss FRAS retweeted
OUT TODAY β¨
From expert @tomkerss discover the incomparable beauty of the #AuroraBorealis in this fascinating guide for aspiring and seasoned night sky observers β the perfect gift for anyone looking to explore the #NorthernLights.
collins.co.uk/products/97800β¦
#Astronomy #Space
Tom Kerss FRAS retweeted
Cosmic Light is out today! ππ«
See the Universe as never before with this wonderfully colourful collection of cosmic imagery, never before seen in print and demystified by experts @tomkerss and @RyanJFrench
ow.ly/lSHv50ZLMcc
#CosmicLight #Space #Astronomy #Science
Tom Kerss FRAS retweeted
Shades on and batteries charging! π π
Romanβs Solar Array Sun Shield and Lower Instrument Sun Shade have successfully deployed, powering the observatory and shading its instruments!
go.nasa.gov/4gw2rqc
Tom Kerss FRAS retweeted
Our #September #shelfie:
Cosmic Light - Tom Kerss & Ryan French
When the Sky Falls - Jade Angeles Fitton
Telescope Eyepieces: Optical Theory & Design - Sean G. Ryan
Meet Jonathan Cowie, author of Earth's Flips of State
Full reviews in the new issue: sbee.link/39x486qfmn
Tom Kerss FRAS retweeted
Roman is ready for liftoff tomorrow at 7:26 a.m. EDT!
The SpaceX Falcon Heavy rocket carrying NASA's Nancy Grace Roman Space Telescope stands vertical at Launch Complex 39A at Kennedy Space Center in Florida.
ALT NASAβs Nancy Grace Roman Space Telescope, encapsulated in a protective payload fairing atop a SpaceX Falcon Heavy rocket, is seen at sunrise, Saturday, Aug. 29, 2026, at Launch Complex 39A at NASAβs Kennedy Space Center in Florida. Photo Credit (NASA/Joel Kowsky)
Tom Kerss FRAS retweeted
Falcon Heavy is vertical at pad 39A in Florida ahead of Sundayβs launch of @NASAβs Nancy Grace Roman Space Telescope, designed to study dark energy, exoplanets, and astrophysics β spacex.com/launches/roman
Tom Kerss FRAS retweeted
A partial lunar eclipse will pass over the Americasβand parts of Europe and Africaβtomorrow night! It will reach its peak around 12:12am ET (0412 UTC) on Thursday, Aug. 28.
More info: go.nasa.gov/4qFpfIL
ALT A diagram depicting the partial lunar eclipse occuring on Aug 28, with times in UTC marking the different stages of the eclipse. Credit: NASA's Scientific VIsualization Studio
Tom Kerss FRAS retweeted
This #HubbleTopImage returns to a NASA/ESA Hubble Space Telescope view of Uranus! π΅
This image, which was taken in October 2022 using both visible and ultraviolet wavelengths, captures a rare view of the aurorae of Uranus. 1/2
Tom Kerss FRAS retweeted
On 12 August there will be a partial solar eclipse from the UK. βοΈ π π
Starting at 6.13pm, maximum eclipse will occur at 7.10pm with around 90-96% of the Sun being obscured, and ends at 8.03pm.
Read more via @skyatnightmag π orlo.uk/5BnjJ
#SolarEclipse2026
ALT A glowing orange crescent of the sun during a partial solar eclipse against a black background. Photo Credit: NASA/Bill Ingalls
Tom Kerss FRAS retweeted
One week to the solar #eclipse! Here's a reminder from where in the world you can see it.Β
Totality falls over a path from Greenland, through Iceland, and across Spain, but much of Europe will still experience a wonderful, deep, partial eclipse.
Where will you be?
Tom Kerss FRAS retweeted
Virtual totality? βοΈ
Ahead of the 12 August eclipse, KU Leuven researchers are using computer simulations and the latest solar observations from missions such as Solar Orbiter and Proba-3 to predict what the solar corona will look like. 1/2
Tom Kerss FRAS retweeted
Omg it's happening! Everybody stay calm! We're officially in our countdown to launch!
Roman is set to launch August 30 at 07:26 am EDT from @NASAKennedy.
Stay up to date on the latest launch details: science.nasa.gov/mission/romβ¦
Learn more about the Roman Space Telescope and how it will help us solve some of the greatest mysteries of the universe: science.nasa.gov/mission/romβ¦