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tunctezel.bsky.social
Tunç Tezel
@tunctezel.bsky.social
240 followers 58 following 610 posts
Night sky photographer, retrograde operator.
Eclipse chaser, TWAN member.
Posts Replies Media Videos
tunctezel.bsky.social
@nocontexttrek1.bsky.social Not the weekend yet.😏🖖
Seven of Nine, Tertiary Adjunct of Unimatrix Zero One is looking serious, saying "I have no desire to have fun".
November 21, 2025 at 8:24 AM
tunctezel.bsky.social
@nocontexttrek1.bsky.social It's the weekend baby.👊🖖
Star Trek Lower Decks scene, Shax asserts authority saying fighting fascism is a full-time job.
October 18, 2025 at 7:30 AM
tunctezel.bsky.social
"...Dr. Jones, on three separate occasions, has attempted to set fire to the herpetology wing of the biology department."
July 14, 2025 at 7:59 AM
tunctezel.bsky.social
APOD 79
2 Worlds, 2 Analemmas
apod.nasa.gov/apod/ap25062...

The Martian analemma was presented by @elakdawalla.bsky.social‬ here:
www.planetary.org/articles/a-m...
...Meanwhile, I had put together the Earth version while I was working in Baku, Azerbaijan:
vimeo.com/195174652
The figure-8 shaped curve you get when you mark the position of the Sun in Earth's sky at the same time each day over one year is called an analemma, as seen in the left hand panel from Baku, Azerbaijan. Shape of the analemma depends on the eccentricity of a planet's orbit and the tilt of its rotation axis, so analemma curves can look different for different worlds. Mars' axial tilt is similar to Earth's, but its orbit around the Sun is more eccentric. As seen by Opportunity rover from Victoria crater in Mars, the analemma traced in the right hand panel is shaped more like a tear drop. Each world's solstices lie at the top and bottom of their respective analemmas.
June 21, 2025 at 6:12 AM
tunctezel.bsky.social
#Heleşüküroviç
officialmelbrooks.bsky.social Mel Brooks @officialmelbrooks.bsky.social · Jun 12
I told you we’d be back
June 12, 2025 at 6:57 PM
tunctezel.bsky.social
This one aged well.
Well, really slowly...😉
nairoingreen.bsky.social Matthias @nairoingreen.bsky.social · May 27
ISAAC DEL TOROS PANTS ARE BROWN
SIMON YATES I WOULD BE SCARED I'D BE SHITTING MYSELF
May 31, 2025 at 2:01 PM
tunctezel.bsky.social
APOD 78
Retrograde Mars 2024-5
apod.nasa.gov/apod/ap25053...
vimeo.com/1085645909

I photographed Mars every 5 to 9 days between 19th September 2024 and 18th May 2025, while the red planet traced its retrograde loop in Gemini and Cancer.
Mars seems to be going backwards (retrograde) from 8th December 2024 until 24th February 2025, as faster Earth catches up and passes slower Mars. The result is a clockwise loop traced against the constellations of Gemini and Cancer in the course of 8 months.
May 30, 2025 at 6:55 AM
tunctezel.bsky.social
@nocontexttrek1.bsky.social 😁🖖
May 27, 2025 at 7:45 AM
tunctezel.bsky.social
@nocontexttrek1.bsky.social I reckon he will be weaving a new one in no time.😏
PS. This is a deserted M-class planet in a dark matter nebula, so we could say, like in a day or two.
May 21, 2025 at 4:21 PM
tunctezel.bsky.social
Retro is always cool...
vimeo.com/1085645909
Retrograde motion of Mars in 2024-'25
Mars spent 8 months in Gemini and Cancer, tracing its apparent retrograde motion between 7th December 2024 and 24th February 2025. The red planet came to opposition…
vimeo.com
May 20, 2025 at 1:29 PM
tunctezel.bsky.social
😁😂
April 18, 2025 at 7:59 AM
tunctezel.bsky.social
@nocontexttrek1.bsky.social you know what to do...😉
April 6, 2025 at 5:20 PM
tunctezel.bsky.social
@daghanirak.com daha yüksek irtifadaki kayak merkezlerini kullanmaları gerekecek. Böyle hoşaf gibi karda ve sıcak havada sakatlık riski de artıyor.
March 9, 2025 at 4:49 PM
tunctezel.bsky.social
Quote post with a picture you took in a National Park.

Hawaii Volcanoes National Park
February 26, 2025 at 6:31 AM
tunctezel.bsky.social
@nocontexttrek1.bsky.social Quark delivers his inner Edwin Starr; in case you may want to use these some time in the future.😉🖖
www.youtube.com/watch?v=ztZI...
February 13, 2025 at 9:54 AM
tunctezel.bsky.social
Here is a Best 9 comet selection, as seen by SOHO LASCO C3.☄️
PS. Comets NEAT and Bradfield were suggested by @sungrazercomets.bsky.social in October 2024.
January 14, 2025 at 8:43 AM
tunctezel.bsky.social
Comet C/2024 G3 Atlas is barely visible against bright twilight with Mercury shining at mag. -0.4. This view is from a 500-meter-high hilltop near Çepni village, about 30 km northwest of Bursa, Turkey. 0748 GMT+3, 10th January 2025.
January 10, 2025 at 11:17 AM
tunctezel.bsky.social
At last, aurora is visible from Bursa, Turkey. An X-class Solar flare and accompanying CME delivered aurora as far south as Bursa, Turkey, 40d N on 10-11 October. This look at north from 1730-meter-high Bakacak peak of Uludağ NP finds red aurora shining over Bursa, and even İstanbul 100 km away.
October 11, 2024 at 8:30 AM
tunctezel.bsky.social
APOD 77
5 comets from SOHO
apod.nasa.gov/apod/ap24101...
A selection of 5 comets, as seen by SOHO Lasco C3 coronagraph. This has been the first time my name appears with an APOD, which I did not actually photograph.
Five bright comets are compared in these panels, recorded by a coronograph on board the long-lived, Sun-staring SOHO spacecraft. Arranged chronologically all are recognizable by their tails streaming away from the Sun at the center of each field of view, where a direct view of the overwhelmingly bright Sun is blocked by the coronagraph's occulting disk. Each comet was memorable for earthbound skygazers, starting at top left with Comet McNaught, the 21st century's brightest comet (so far). C/2023 A3 Tsuchinshan-Atlas, approaching its perihelion with the active Sun at bottom center, has most recently grabbed the attention of comet watchers around the globe. By the end of October 2024, the blank 6th panel may be filled with bright sungrazer comet C/2024 S1 Atlas. ... Or not, as C/2024 S1 Atlas may actually disintegrate.
October 10, 2024 at 6:35 AM
tunctezel.bsky.social
APOD 76
Mars, Uranus, Pleiades
apod.nasa.gov/apod/ap24080...
I photographed Mars for 16 days between 12-27 July 2024, as it passed by Pleiades, and also greenish Uranus which is moving much slower in the sky. I started photography at Mt. Sandras in Denizli, then completed imaging in Bursa, Turkey
August 2, 2024 at 9:33 AM
tunctezel.bsky.social
APOD 75
Solstice Moon
apod.nasa.gov/apod/ap24062...
Full Moon of 21-22 June 2024 occurred within 28 hours of the solstice. I set up a camera at my rooftop in Bursa, Turkey to photograph the Moon every 10 minutes, which stayed less than 7 hours in the sky and rose only 22 degrees at local midnight.
The Moon is around a major lunar standstill, an extreme in the monthly north-south range of moonrise and moonset caused by the precession of the Moon's orbit over a ~19 year cycle. As a result, the full Moon of June 2024 solstice was at its southernmost moonrise and moonset along the horizon.
June 29, 2024 at 9:01 AM
tunctezel.bsky.social
APOD 74
All Sky Moon Shadow and Eclipse

Sun is up, but the sky is dark and the horizon is bright all around. Then you are in the Moon's shadow during a total eclipse of the Sun. Along with the solar corona surrounding the silhouette of the Moon planets and stars are visible during totality.
From the photographer: “I observed the total Solar eclipse of 8th April 2024 at a farm near Fox and Shirley, Arkansas, which lasted lasted 4 minutes 15 seconds. One aspect about the total Solar eclipses I like very much is the dark blue sky surrounded by twilight colours all round the horizon and stars becoming visible. There is never enough time to look for the stars, so I try to do the next best thing, which is photographing all the sky and horizon. In this panorama, the southern horizon is at the bottom, east is to the left, north at top and west is to the right. The Sun was high due south during totality. Thanks to the Lunar shadow being larger than normal, the sky got dark enough to record four planets and many stars above at our location. Alternate image is the annotated version of this panorama, labeling the visible planets, some bright stars and also showing some constellation figure lines.
April 27, 2024 at 8:46 AM
tunctezel.bsky.social
Eclipse, Pons-Brooks, shadow, beads...😎🌚🌞🌟💫
April 15, 2024 at 4:17 PM
tunctezel.bsky.social
We watched the total Solar eclipse of 8th April 2024 at a farm near Shirley, Arkansas. This was how I was able to catch the beginning of totality, which lasted 4 minutes 15 seconds.
April 9, 2024 at 12:34 AM
tunctezel.bsky.social
This 29th February marks my 32nd year as an active amateur astronomer and night sky photographer, according to my logs. Back then, I was a young guy looking at the southern sky in the evening and trying to photograph it. This picture from 29th February 2004 catches Jupiter at a spot similar to 1992.
In addition to the winter constellations which I was just beginning to recognise, Jupiter was an extra luminary at opposition a few degrees to the east of Regulus. Unfortunately, that very first roll of medium format film that I exposed with a Lübitel camera is lost. But this shot from 29th February 2004 could be a nice placeholder.
February 29, 2024 at 8:45 PM