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steven.sandner
Waxing Gibbous Moon over Melbourne, Australia

More about me & prints:
https://linktr.ee/steven.sandner

Aperture: f/11 (for sharpness and detail on the moon’s surface)
Shutter Speed: 1/250s (to capture the bright moon without overexposure)
ISO: 100 (to maintain clarity and reduce noise in the night sky)

Multiple images used to create a composite HDR image taken through a spotting scope with a mobile phone.

#Moon #NightSky #Nature #Astrophotography #Melbourne #Lunar
A detailed photograph of a waxing gibbous moon glowing brightly against a starry night sky over Melbourne, Australia. The moon’s craters and surface features are clearly visible, creating a striking contrast with the surrounding darkness and scattered stars.
#lunar
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Enrique Boeneker

I like this galaxy very much. However, I don't know if I like it because of its "grand design" or because it reminds me of The Time Tunnel. Yes, that ancient TV show in which Tony and Douglas were inevitably lost in time. (Never understood how the guys in charge could retrieve a massive mammut from the past, but not the pair of time travelers together). Anyway, this is M51, The Time Tunnel.

In my post, I said the photograph was only of M51, the Whirlpool Galaxy. But that's not true. This galaxy obviously is tearing apart another galaxy, its neighbor: NGC 5195, or M51b for short. The name of M51, the bully, seems appropriate; it is indeed a cosmic maelstrom. I must mention that there are a lot of "cosmic maelstroms" in our universe, so M51 taking all the credit does not seem fair to me. I've added information of the red wavelength known as H-alpha. In this particular wavelength, ionized hydrogen emits a lot of light. Emission nebulae are made mainly of ionized hydrogen, so you can see in this picture many of these kinds of nebulae sparkling with a reddish color, the spiral arms of this majestic thing. How far this thing is, you may ask. Who knows, it might be 15 million l-y or 30 million l-y away, according to the available literature. I take bets. You can find more galaxies, if your are patient enough...
#astronomy#astrophotography#galaxy
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Steven Sandner

Mesmerizing nightscape of sand dunes under the Milky Way and aurora Australis, East of Esperance, Western Australia

More about me & prints:
linktr.ee/steven.sandner

Aperture: f/1.8 (for maximum light intake in low-light conditions)
Shutter Speed: 30s (to capture the stars and aurora without star trails)
ISO: 1600 (to enhance sensitivity to faint celestial light while managing noise)

#Desert #Stars #Aurora #Nature #Landscape #NightSky

A breath-taking night photograph of undulating sand dunes under a star-filled sky, featuring the Milky Way arching across the heavens and a vibrant aurora with pink and green hues glowing on the horizon. The serene, otherworldly scene highlights the stark beauty of the desert under celestial light.
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Enrique Boeneker

Active Galactic Nuclei (AGN) feature a supermassive black hole at a galaxy's center. These things come in three flavors: quasars, blazars, and Seyfert galaxies. But don't get confused! They are almost the same phenomenon viewed from different angles. However, an important difference between quasars/blazars and Seyferts seems to exist. The latter is less energetic than the former, which are also farther away from us. A good example of a Seyfert Galaxy is M 64, the Black-Eyed Galaxy.

If you compare this Galaxy with M 63, the Sunflower Galaxy I posted a few days ago, this looks very "smooth." If you look closely, you can make up the spiraling arms since they are spinning tightly around its center. A patch of dark dust is very close to the galaxy's core. Because of this, they call it the Black-Eyed Galaxy. M 64 is about 17 million l-y away from us according to the literature available. Soft gradients discretely show this galaxy's structure.
#Astrodon#astronomy#astrophotography
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Dr. John Barentine FRAS

"What the Isle of Rum lacks is artificial illumination. There are no streetlights, light-flooded sports fields, neon signs, industrial sites or anything else casting a glow against the night sky. On a cold January day, the sun sets early and rises late, yielding to a blackness that envelopes the island, a blackness so deep that the light of stars manifests suddenly at dusk and the glow of the moon is bright enough to navigate by. For this reason, Rum was recently named Europe’s newest dark-sky sanctuary."

nytimes.com/2025/02/24/science

The New York Times · Embracing Darkness on the Isle of RumPar Nicholas J. R. White
#Europe#UnitedKingdom#Scotland
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