#7023
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comicscovers.bsky.social
American Splendor 4 (7023)
October 2, 2025 at 12:06 PM
jwstfeed.bsky.social
Beautiful NIRCam image of NGC 7023.
September 29, 2024 at 7:49 PM
astronomers.bsky.social
Caldwell 4 also called the Iris Nebula, or NGC 7023

Credit: NASA & ESA
This beautiful, blushing nebula is unique amongst its counterparts. While many of the nebulae visible in the night sky are emission nebulae — clouds of dust and gas that are hot enough to emit their own radiation and light — Caldwell 4, otherwise known as the Iris Nebula or NGC 7023, is a reflection nebula. This means that its color comes from the scattered light of its central star, which lies nestled in the abundant star fields of the constellation Cepheus. Located some 1,400 light-years away from Earth, the Iris Nebula’s glowing gaseous petals stretch roughly 6 light-years across. The Iris Nebula was discovered by German-British astronomer Sir William Herschel on October 18, 1794. (Herschel has an impressive track record, having also discovered the planet Uranus and having been knighted in 1816.) His Iris Nebula has an apparent magnitude of 7. Located near the North Celestial Pole and the North Star (Polaris), Caldwell 4 is nearly impossible to see from the Southern Hemisphere. For best viewing in the Northern Hemisphere, use a telescope in early autumn to star hop from the two brightest stars in the constellation Cepheus. Since the Iris Nebula is faint and diffuse, dark skies away from city lights are recommended for viewing it. This nebula is of particular interest to scientists because of its colors. Reflection nebulae glow because they are made up of extremely tiny particles of solid matter, up to 10 or even 100 times smaller than dust particles on Earth. These particles diffuse the light around them, giving the nebula a second-hand glow that’s typically bluish (like our sky). While the Iris Nebula appears predominantly blue, it includes large filaments of deep red, indicating the presence of an unknown chemical compound likely based on hydrocarbons. Studying nebulae like this one helps astronomers learn more about the ingredients that combine to make stars.
December 7, 2024 at 12:25 PM
stefankellner.bsky.social
🔭NGC 7023, aka the Iris Nebula, is a bright reflection nebula in the constellation Cepheus, where starlight from a young star illuminates surrounding interstellar dust, creating a vivid, flower-like glow. Image taken from trevincaskies.com, Spain.
Large Version: app.astrobin.com/i/49o08f
NGCO 7023, the Iris Nebula
June 21, 2025 at 6:46 PM
margareterosali.bsky.social
Good night 😴dear people at #Bluesky💙-

dream something blue 🌝

Julio Maiz
@maiz_julio💞

📷 NGC 7023 Iris nebula tmblr.co/ZHSGxTZfa5pi...
April 30, 2025 at 7:48 PM
astrobin.com
AstroBin's Image of the Day: "NGC 7023 - Iris Nebula" by Robert Eder

www.astrobin.com/zt2ft4/

#astrophotography
NGC 7023 - Iris Nebula
July 29, 2026 at 12:02 PM
catherineryanhyde.bsky.social
NGC 7023, the Iris Nebula in Cepheus. #Astronomy #Astrophotography
November 22, 2025 at 3:35 PM
xipteras.com
NGC 7023 is a reflection nebula located in the constellation of Cepheus. #astrophotography #nebulae
August 4, 2025 at 5:16 PM
hourlycosmos.bsky.social
NGC 7023 - From Judy Schmidt (geckzilla.bsky.social) - https://flic.kr/p/2jbPX9s
A close up view of a section of NGC 7023, also known as the Iris Nebula. Off the top frame, the star HD 200775 shines brightly, illuminating the nebula with blue light. This view includes near-infrared light, revealing the reddened light of stars attenuated by their dusty environment. Red and brown hues represent light shining through dust, while blue represents light reflecting from dust and gas. Data from the following proposal were used to create this image: The Exciting Wavelength of Extended Red Emission Red: ACS/WFC F850LP Green: ACS/WFC F625W Blue: ACS/WFC F475W North is 169.96° clockwise from up.
November 16, 2025 at 7:00 PM
angrywaterman.bsky.social
In Space tonight: Like delicate cosmic petals, these clouds of interstellar dust and gas have blossomed 1,300 light-years away in the fertile star fields of the constellation Cepheus. Sometimes called the Iris Nebula and cataloged as NGC 7023, this is not the only nebula in the sky to evoke 🌺
January 4, 2025 at 12:15 AM
puckingladylike.bsky.social
I did it! Call your senators!

For NM: @heinrich.senate.gov's Albuquerque office is 505-346-6601 and @lujan.senate.gov's Albuquerque office is 505-337-7023
fishtopher.bsky.social Fishtopher and Friends @fishtopher.bsky.social · May 22
Congress is currently attempting to pass a bill that will ban transgender healthcare for minors and adults under Medicaid and ACA. It passed in the House, and is going to the Senate. Please tell your Senators to vote NO on HR1, to help transgender people like myself continue to access healthcare
borderless.bsky.social borderless @borderless.bsky.social · Dec 14
Fuck it. Trans folks need MATERIAL SUPPORT.

@distributeaid.org is launching an HRT Harm Reduction Toolkit that provides 1 year of medical supplies needed to take injection-based HRT. We were planning to go live in January, but I'm not waiting.

Fund the kits here: distributeaid.org/hrt-harm-red...
May 22, 2025 at 4:22 PM
herrmicha.bsky.social
Ja ich weiß, bei Vollmond macht man keine Bilder, aber ich konnte einfach nicht widerstehen...

#astrophoto #Astrofotografie #Seestar
Der Cocoonnebel. IC 5146. Aufgenommen bei Vollmond mit einem Seestar S50 Pro. Der Irisnebel. NGC 7023. Aufgenommen bei Vollmond mit einem Seestar S50 Pro.
September 26, 2026 at 12:53 PM
quantumkat.bsky.social
After several nights of capturing data, I'm excited to present the Iris Nebula (NGC 7023)

This is a blue reflection nebula emerging from a surrounding dark cloud of interstellar dust.

🔭N130/900, 📷Sony A7S
@kat-astro-bot.bsky.social, what do you see ?
Wide-field astrophotograph of the Iris Nebula (NGC 7023), a bright blue reflection nebula surrounded by dark interstellar dust clouds. The central star illuminates the nebula, while fine dust filaments and subtle color gradients fill the surrounding space.
April 13, 2025 at 1:09 PM
astronomy.bsky.social
The Iris Nebula (NGC 7023), 1,300 light-years away in Cepheus, spans 6 light-years. Its blue hue comes from reflected starlight, while faint red glows are dust converting UV light. Infrared also detects complex carbon molecules (PAHs).

Credit: Justus Falk
NGC 7023: The Iris Nebula
January 16, 2026 at 6:15 PM
yuyushiki-s.bsky.social
Captured frame number 7023 from the anime Yuyushiki ゆゆ式
September 21, 2026 at 2:20 AM
apod.shinyakato.dev
🔭 NGC 7023: The Iris Nebula

Image Credit & Copyright: Justus Falk

apod.nasa.gov/apod/ap26011...
These cosmic clouds have blossomed 1,300 light-years away in the fertile starfields of the constellation Cepheus. Called the Iris Nebula, NGC 7023 is not the only nebula to evoke the imagery of flowers. Still, this deep telescopic image shows off the Iris Nebula's range of colors and symmetries embedded in surrounding fields of interstellar dust. Within the Iris itself, dusty nebular material surrounds a hot, young star. The dominant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight. Central filaments of the reflection nebula glow with a faint reddish photoluminescence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula contains complex carbon molecules known as PAHs. The dusty blue petals of the Iris Nebula span about six light-years.
January 16, 2026 at 8:00 AM
ianwalker.bsky.social
Why yes I *am* still faffing about reprocessing this photo of the Iris Nebula (NGC 7023) for the fifth time. What of it?
A zonking big cloud in space, illuminated by a central star
May 27, 2026 at 6:46 PM
theastroastro.bsky.social
NGC 7023 [by reickmey]

#astrophotography #astronomy
July 18, 2025 at 10:47 PM
bemanastro.bsky.social
The Iris Nebula (also known as NGC 7023 and Caldwell 4) is a bright reflection nebula in the constellation Cepheus. #astronomy #astrophotography #video #animation #telescope #universe #deepsky #3d #stars #nebula
August 9, 2025 at 1:49 PM
oldvalravn.bsky.social
🔭 Туманность Ирис (NGC 7023) - отражательная туманность в созвездии Цефея, расположенная примерно в 1,3 тыс. св. лет от Земли.

Автор снимка - Daniel Nimmervoll.
September 10, 2026 at 5:24 AM
gumbyscreens.bsky.social
Frame #7023 from E57 The Abominable Doughman
November 5, 2023 at 12:20 PM
sydney-black.bsky.social
Sydney Black the librarian webslut 7023
#Sydney #SydneyBlack #Webslut #Librarian #Liégeoise #Freckles #BlackHair #Blueeyes
September 2, 2026 at 2:33 PM
retokore2024.bsky.social
【第2118回ロト６・第7023回ナンバーズ４・ナンバーズ３】2026年7月9日(木)の結果発表！

#ロト6 #ナンバーズ4 #ナンバーズ3
www.kurudesyo.com/takarakuji/k...
【第2118回ロト６・第7023回ナンバーズ４・ナンバーズ３】2026年7月9日(木)の結果発表！
さぁ2026年7月9日(木)の第2118回ロト６・第7023回ナンバーズ４・ナンバーズ３の結果発表です！   ロト６の当選番号 今回の第２１１８回の当選番号はこちらになります。   【０１】【０５】【
www.kurudesyo.com
July 9, 2026 at 12:58 PM
astromikemerri.bsky.social
A new video we made, which focuses on one of my favourite objects in the night sky, Caldwell 4, aka NGC 7023, aka The Iris Nebula. It has quite a story to tell, which relates to why the sky is blue, and why some other things are red! 🔭🧪

youtu.be/aNJgQlJDPMY
The Iris Nebula (NGC 7023 or Caldwell 4) - Deep Sky Videos
YouTube video by DeepSkyVideos
youtu.be
October 28, 2025 at 10:20 PM