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.

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

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

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.

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.

Remember those days when Pluto was just a blip on a photographic plate, then merely a fuzzy set of dots on a Hubble telescope image?

No more.

Astronomy Picture of the Day for 15/1/21 featured this photo taken by the New Horizons probe 15 minutes after its closest approach to the (dwarf) planet when it was 18,000 kilometres away from the surface.

Some of the mountains on show are comparable in height to the highest on Earth but of course they are not composed of rock but most likely of ice. The plains below them may contain solid nitrogen or carbon dioxide.

Also visible above Pluto’s horizon is its tenuous atmosphere.

From Astronomy Picture of the Day for 9/1/21 here is a view of Saturn’s moon Tiatn that you would never see if you were somehow be able to be on Saturn itself.

Titan is tide-locked to its primary and so always presents the same face to it. Its reverse side however was however visible to the Cassini probe.

Since Titan has an atmosphere its surface is not seen directly but the fuzziness around its edges – seen against the thick line of Saturn’s rings and the planet itself beyond – shows the atmosphere’s thickness relative to the satellite.

The video below is from YouTube.

Does it show fireworks?

Sparklers perhaps?

No. This is sprite lightning captured on film at 100,000 frames a second.

I first saw this on Astronomy Picture of the Day for 4/1/21.

On Astronomy Picture of the Day (APOD) for 3/1/21 there is a picture taken by Hallgrimur P Helgason, showing a great example of pareidolia (the tendency of humans to perceive a pattern that is not there.)

As it isn’t copyright free I’m not displaying it here but this is the link.

It’s a wonderful shimmering green-aura’d image of a flying bird which APOD likens to a phoenix (itself of course non-existent.)

This is an oddity. From You Tube via Astronomy Picture of the Day for 16/12/20.

It’s a sonified image of the Bullet Cluster with low tones assigned to Dark Matter, mid-range to visible light and higher tones to X-rays.

It may be though that Dark Matter does not exist, as this post from the Daily Galaxy argues.

This is an animated sequence from You Tube via Astronomy Picture of the Day for 3/11/20 showing the OSIRIS-REx spacecraft touching – and lifting up part of – the surface of asteroid Bennu.

The plan is to return the sample to Earth for analysis with an eye to determining conditions in the early Solar System and whether the astreroid contains unusual minerals.