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Galaxy M74

From NASA via Astronomy Picture of the Day for 13/8/21.

A beautiful spiral galaxy. The image shows emissions from hydrogen atoms, emphasising the reddish glow of the parts of the galaxy where stars are forming.

Galaxy M74

The galaxy looks slightly different in visible light.

Ring Galaxy AM 0644-741

This lovely picture comes from NASA via the Hubble Telescope and Astronomy Picture of the Day for 28/7/21. The galaxy’s distorted shape is due to it having interacted with another galaxy (top right) which passed through it.

Ring Galaxy AM 0644-741

Andromeda in Ultra-violet

This is from NASA via Astronomy Picture of the Day for 18/7/21.

The Andromeda Galaxy as seen in ultra-violet light. Compared to visible light images it really picks out the spiral arms but makes them look more like rings.

Andromeda in u-v

A Celestial Necklace

From Astronomy Picture of the Day for 18/5/21.

This beautiful celestial apparition is known as the Necklace Nebula. It is a so-called planetary nebula. These are formed by gases thrown off by stars nearing the end of their lives. The Nebula Necklace’s “Diamonds” are knots of glowing gas.

The Necklace Nebula

Crescent of Earth

Only 24 people have ever had the chance to see a view like this – or photograph it. The 24 astronauts of the Apollo Programme who made it to the Moon and back.

From Astronomy Picture of the Day for 29/4/21, a digitally restored photograph of the whole of planet Earth from its nightside, the last picture of its kind so far to be taken by human hands.

Crescent of Earth

Star Shredding Animation

From You Tube via Astronomy Picture of the Day for 27/4/21.

An animation of a star being shredded by a black hole.

Ingenuity’s First Flight.

From You Tube via Astronomy Picture of the Day for 20/4/21.

Ingenuity’s first (short) flight through the Martian atmosphere as seen from the Perseverance rover.

Flying a Kite

Two kites have been flown in the past twenty four hours.

One of them was on another planet.

The other might as well have been.

These are the days of miracle and wonder.

But also of greed and thoughtlessness.

O tempora, o mores.

Four Moons in One Frame

With bonus rings.

Another great picture from the Cassini Probe, taken from Astronomy Picture of the Day for 4/4/2021.

Four Saturnian Moons

The most obvious moon is the bright Dione, hovering on the centre of the frame, with shadowy but much larger Titan in the background. Titan is the tenth largest object in the Solar System bigger than the planet Mercury.

To the extreme right of the rings is Pandora, a moon which shepherds Saturn’s F ring.

Just in the gap in the rings (the Encke gap) is Pan, only 35 kilometres across but which keeps the gap free of ring particles.

Eyeball this Nebula

I found this (copyrighted) image on Astronomy Picture of the Day for 18/1/21.

The text on APOD’s post refers to it as looking like a brain – hence its name, the Medulla Nebula.

To me, though, it looks more like an eyeball – with the optic nerve going off to the right as in the diagram below.

eyeball

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