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Thierry Legault @ThierryLegault

Astrophotographer - Author

Joined June 2010
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159 Photos and videos
The deployment of the immense prominence of May 23 for 135 minutes! 😎 Watch it in full screen and compare to Earth to scale! Takahashi FSQ-106ED, Coronado SM90 DS, Player One Saturn-M YT link: youtube.com/watch?v=xJR2k4qA…
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Here's a transit of the ISS I took in 2015 As depicted here, the ISS is visible over the solar disk but not over the "sky background" (which is not the corona but only atmospheric and instrumental glow) That's PHYSICALLY IMPOSSIBLE! 🤔
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This is also applicable to partial solar eclipses: the part of the Moon not covering the solar disk is invisible and undetectable. So, any dark disk outside the Sun is just a Photoshop drawing!
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Today's huge and fast prominence, only 15 minutes between each of those images! 😎 The Earth at scale on the left 😲
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Today's partial eclipse from Paris in Halpha and calcium K 😎
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Vivid and colorful northern lights on Jan 27 from Skibotn, Norway 🤩 Coming soon: the breathtaking show of Feb 1st, thanks to a huge coronal hole 😊 Sigma fp-mod & 14mm 1.8 Art
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I did not want to miss Saturday's occultation of Saturn, it was the last one until 2031! So I traveled to Tarragona, Spain 😊 The star besides Saturn is 85 Aquarius (mag 6.7) C8 Edge HD & ASI178MC
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I got Bronze medal at the 24/25 German Photo Book Prize! 🤩 <<This award recognizes the exemplary photographic quality of the award-winning work >> Many thanks to dpunkt Verlag 🤗 Or course, the original French 4th edition is also available in all bookstores! 😉
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My very last shot of Tsuchinshan-ATLAS from Gran Canaria last night...before going back to France! 🤗 Sigma fp mod & 20mm 1.4 Art DG DN, 15s @f/2
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My last shot of Tsuchinshan-ATLAS on Thursday from Maspalomas dunes (Gran Canaria), with a view of the lighthouse 😊 It's amazing to see how fast the comet moved away from Earth, just three days after my Monday shot in La Palma! 😲
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Tsuchishan-ATLAS tonight with its tail and anti-tail over the huge Magic telescopes at La Palma observatory, Canary islands 😊 Sigma fp & 20mm 1.4 DG DN
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Giant X4.5-class flare in AR3825 today! 😍 Just 15 minutes before this image, the flare ejected matter visible on the left at very high speed: 400 km/s! The Earth at scale in the corner 🙂
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Magnificent prominences today including huge loops! 😎 The Earth at scale on top 😮
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The Moon, Saturn...and the ISS! 😎 After the May 31 occultation from Argentina, I wanted something more challenging! 😁 I decided to install my telescope in Spain, in a precise place near the Almendra dam in Castilla&Leon to catch the ISS just 30 min after the occultation 😜
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One of the biggest sunspots of the solar cycle faces Earth today! 😎 Several groups are able to host powerful eruptions that could generate geomagnetic storms and auroras in the days to come 😍
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One of the biggest sunspots of the solar cycle faces Earth today! 😎 Several groups are able to host powerful eruptions that could generate geomagnetic storms and auroras in the days to come 😍
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A large sunspot group and the solar granulation in high resolution with C14 EdgeHD and Astrolar photo sheet 😎 Each granulation cell is approximately 1000 km wide and lives only a few minutes.
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A lot of sunspots today! 😎 The Earth at scale in the corner 😮 FSQ-106 refractor on AM-5, ASI183MM, H-alpha and Calcium filters
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Exceptional eruptive protuberance today! 😍 It exploded within minutes and I had the luck to capture several moments between clouds above Paris 😎 Earth to scale at left edge of frame 😯 Coronado SM90 DS, Taka FSQ-106 on ZWO AM-5, ASI183MM
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Impressive solar activity today: many sunspot groups, a huge prominence (dark filament over the disk) and above all outstanding eruptive loops materializing the solar magnetic fields! 😎 The Earth at scale on the left edge 😅
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