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A rarely imaged target as it is very dim. This image took me over 50h of total exposure time. Total exposure time: 52h 40' Image resolution: 4,490 × 4,552px (0.96″/px) Shot from my driveway near Tucson, AZ in late 2023 Telescope: William Optics RedCat
a year ago

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More from Light from Space

Andromeda: Our Galactic Neighbor

Many things have been said about the Andromeda Galaxy, arguably the most majestic galaxy that amateur astronomers can image due to it's sheer size in the sky—many times larger than the Moon appears to us, but also many times dimmer. With the naked eye, even in

9 months ago 76 votes
The Rosette Nebula

Next to the Orion Nebula, the Rosette Nebula is definitely a must-do on the list of every aspiring astrophotographer. Located not too far from Orion in Monoceros, this large H II region has spectacular features, centered around a star cluster. Click or tap to enlarge/double-tap to zoom My image

over a year ago 42 votes
The Helping Hand of LDN 1355

LDN 1355 is a dark nebula in Cassiopeia, vaguely in the shape of an outstreched human hand—the dark dust obscuring the reflection nebula behind it. Total exposure time: 58h 50' (211,800s) Image resolution: 5,216 × 3,909px (1.924″/px) Shot from my driveway

over a year ago 44 votes
The Soul of the Heart Nebula

A spectacular emission Nebula, the Heart Nebula is one of the classics of Northern Hemisphere amateury astronomy. In the gallery below, I've highlighted 3 very different areas of the image: Left: Planetary Nebula WeBo-1 Middle: Melotte 15 in the... heart of the Heart Nebula Right: The “Fish

over a year ago 44 votes

More in science

What's new in biology, summer 2025 edition

The first gonorrhea vaccination program, contact lenses that see infrared light, the protein behind sweet tastes, a baby cured with gene therapy, and more

17 hours ago 2 votes
Computer Scientists Figure Out How To Prove Lies

An attack on a fundamental proof technique reveals a glaring security issue for blockchains and other digital encryption schemes. The post Computer Scientists Figure Out How To Prove Lies first appeared on Quanta Magazine

16 hours ago 2 votes
Koalas Spend Just 10 Minutes a Day on the Ground — That's Usually When They're Killed

Koalas, which spend most of their lives high up in eucalyptus trees, usually die while on the ground, often mauled by dogs or hit by cars. More striking, a new study reveals that the amount of time they spend on the ground is only around 10 minutes a day. Read more on E360 →

yesterday 2 votes
New updates + tetrahedra, tunneling times, and more

Here are a number of items from the past week or so that I think readers of this blog might find interesting: Essentially all the news pertaining to the US federal funding of science continues to be awful.  This article from Science summarizes the situation well, as does this from The Guardian and this editorial in the Washington Post. I do like the idea of a science fair of cancelled grants as a way to try to get alleged bipartisan appropriator notice of just how bad the consequences would be of the proposed cuts.   On a more uplifting note, mathematicians have empirically demonstrated a conjecture originally made by John Conway, that it is possible to make a tetrahedral pyramid that, under gravity, has only one stable orientation.  Quanta has a nice piece on this with a cool animated gif, and here is the actual preprint about it.  It's all about mass distributions and moments of inertia about edges.  As others have pointed out including the authors, this could be quite useful for situations like recent lunar lander attempts that seem to have a difficult time not topping over. A paper last week in Nature uses photons and a microcavity to try to test how long it takes photons to tunnel through a classically forbidden region.  In this setup, it is mathematically legit to model the photons as if they have an effective mass, and one can model the barrier they need to traverse in terms of an effective potential energy.  Classically, if the kinetic energy of the particle of interest is less than the potential energy of the barrier, the particle is forbidden inside the barrier.  I've posted about the issue of tunneling time repeatedly over the years (see here for a 2020 post containing links), because I think it's a fascinating problem both conceptually and as a puzzle for experimentalists (how does one truly do a fair test of this?).  The take-away from this paper is, the more classically forbidden the motion, the faster the deduced tunneling time.  This has been seen in other experiments testing this idea.  A key element of novelty in the new paper is the claim that the present experiment seems (according to the authors) to not be reasonably modeled by Bohmian mechanics.  I'd need to read this in more depth to better understand it, as I had thought that Bohmian mechanics applied to problems like this is generally indistinguishable in predictions from conventional quantum mechanics, basically by design. In other non-condensed matter news, there is an interstellar comet transiting the solar system right now.  This is very cool - it's only the third such object detected by humans, but to be fair we've only really been looking for a few years.  This suggests that moderately sized hunks of material are likely passing through from interstellar space all the time, and the Vera C. Rubin Observatory will detect a boatload of them.  My inner science fiction fan is hoping that the object changes its orbit at perihelion by mysterious means.   This week is crunch time for a final push on US congressional appropriators to try to influence science agency budgets in FY26.  I urge you to reach out if this matters to you.  Likewise, I think it's more than reasonable to ask congress why the NSF is getting kicked out of its headquarters with no plan for an alternative agency location, so that the HUD secretary can have a palatial second home in that building.

yesterday 5 votes
In Uganda, Deadly Landslides Force an Agricultural Reckoning

As growing populations denude its slopes and heavy rain intensifies, Mount Elgon has become increasingly vulnerable to landslides. In response, Ugandan farmers are planting native trees and changing the crops they plant in efforts to build resilience against future disasters. Read more on E360 →

2 days ago 3 votes