Artifacting

Putting I Between Art And Facts

science

The Moon Dressed In A Saturn Costume For Christmas Eve

by Leave a Comment

Saturn Moon

Landscape, astro, and adventure photographer Francisco Sojuel took this incredible image of a waning crescent moon pierced by a thin cirrostratus cloud. The image appears as if it is the moon is dressed in a Saturn costume. The dimly lit silhouette of volcano Pacaya and the Guatemalan highlands drape the foreground.

The bottom-facing crescent is lit from below by the sun, just under the horizon, a few hours before sunrise. The image was taken on December 24th, 2019, two days before a solar eclipse, placing the sun almost directly under the moon and compounding the effect. The rest of the moon is lit by ashen glow via a fairly lengthy exposure time.

Longevity Primer

by Leave a Comment

Laura Deming runs the $26 million Longevity Fund – a VC firm dedicated to funding early-stage companies with a high-potential for increasing human lifespans.

Her blog has an interesting primer on longevity and the science behind increasing human lifespans. It’s filled with all kinds of well-referenced facts about things that affect our aging and ability to lead long lives.

10 years ago, one of the first projects I worked on was trying to understand a weird fact about reproduction in worms. If you take little worms and get rid of their gonads (I know, it’s weird), they live ~60% longer than normal. But this only works if you get rid of the stuff inside (sperm/eggs – these worms are hermaphrodites, which means they carry around both). If you get rid of the whole thing, lifespan goes back to normal.

Don’t miss the 95 things that make mice live longer and 70 drugs in the clinic that might make people live longer sections.

Via Oreilly

I Can’t Stop Thinking About The Eclipse.

by 3 Comments

2017 Eclipse

I can’t stop thinking about the eclipse.

I thought I pretty much knew what to expect from the 2017 solar eclipse. I understood the science. I had already witnessed a few partial/annular eclipses. I’ve been anticipating the event for a few years now and had read about the sensory changes I could expect to witness. I had a few good viewing locations scoped out with choices depending on the cloud coverage or crowds we might run into that day. My 3 1/2-year-old twins had plenty of food, water, sunscreen, eclipse glasses, and excitement. We were prepared for the event. But I soon learned that nothing could prepare me for the experience.

We had a perfect location on a ridge near Muddy Mountain Wyoming that provided 360 degree views. We were away from the crowds. And most importantly it was cloudless with 2 minutes and 18 seconds of anticipated totality.

We spent an hour watching the partial eclipse and eating a picnic lunch in the shade provided by some old, scraggly, Limber Pines. Eventually, the temperature began to drop slowly. Soon our surroundings dimmed and crickets began to chirp. I found myself caught off guard by the strangeness of my environment. The landscape appeared rosy and dimmed – as if I was wearing sunglasses. My stomach flipped with anticipation and anxiety caused by the surreality of my surroundings.

Quickly, much faster than I anticipated, darkness descended on us. The disorienting passage of time was head-spinning. I took my eclipse glasses off to see if I could see the umbra race toward us from across the valley below. But it happened too quickly. It was with a ridiculous suddenness that the moon’s shadow had shrouded us. I quickly turned around and looked up and saw the eclipsed sun glowing in the sky and my brain turned inside out.

My fingers fumbled around for my camera phone and I somehow managed to capture the image above. I tried to take a video of the “sunset” that surrounded us in every direction, but I only managed to catch these three seconds. I was overwhelmed.

The corona was much more bright and lustrous than I envisioned. It shone bright white and with a jaw dropping brilliance. We were all bewildered with its beauty and absolute strangeness. To look up into the sky and see a sparkling shine, unlike anything I have ever seen in my years of looking at the heavens. To share this with my wife and children.

And then it was gone. And now I can’t stop thinking about the eclipse.

Seven Earth-like Planets Found Orbiting Nearby Star

by Leave a Comment

TRAPPIST1 Size Comparison ChartImage via Space.com

This morning NASA announced the discovery of seven Earth-like planets “that could harbor life” orbiting an ultra cool red dwarf star. Three of these seven newly discovered planets are in the Habitable Zone. The exoplanets circle the star TRAPPIST-1, which lies just 39 light-years (235 trillion miles) away — a mere stone’s throw in the cosmic scheme of things.

From Washington Post:

The discovery, reported Wednesday in the journal Nature, represents the first time astronomers have ever detected so many terrestrial planets orbiting a single star. Researchers say the system is an ideal laboratory for studying alien worlds and could be the best place in the galaxy to search for life beyond Earth.

“Before this, if you wanted to study terrestrial planets, we had only four of them and they were all in our solar system,” said lead author Michaël Gillon, an exoplanet researcher at the University of Liège in Belgium. “Now we have seven Earth-sized planets to expand our understanding. Yes, we have the possibility to find water and life. But even if we don’t, whatever we find will be super interesting.”

Here’s the paper in Nature: Seven temperate terrestrial planets around the nearby star TRAPPIST-1.

There Are At Least 10 Times More Galaxies In The Universe Than We Thought

by Leave a Comment

The universe suddenly looks a lot more crowded.

Waaaaay back in 1995, the Hubble Deep Field images surprised the world by revealing how crammed the universe is with galaxies. At that time astronomers estimated there were about 200 billion galaxies in the universe. Recent estimates put that count closer to 2 trillion, at least 10 times as many galaxies as we thought. However, about 90% of the galaxies in the observable Universe are actually too faint and too far away to be seen or studied. Phil Plait explains:

Now, let me be clear. This doesn’t meant the Universe is ten times bigger than we thought, or there are ten times as many stars. I’ll explain — I mean, duh, it’s what I do — but to cut to the chase, what they found is that there are lots of teeny, faint galaxies very far away that have gone undetected. So instead of being in a smaller number of big galaxies, stars are divvied up into a bigger number of smaller ones.

And it doesn’t mean the Universe has 10 times more mass than we thought. The mass is the same, it’s just distributed differently than we thought. It’s like knowing there are 1 million people in a city, and finding out they live in 100,000 buildings when you thought they were only in 10,000. There are more buildings, but not more people

This discovery has also helped lead to explanations for Olbers’ paradox which states, “Why is the sky dark at night if the universe contains a multitude of stars?” NASA helps explain:

The team came to the conclusion that indeed there actually is such an abundance of galaxies that, in principle, every patch in the sky contains part of a galaxy. However, starlight from the galaxies is invisible to the human eye and most modern telescopes due to other known factors that reduce visible and ultraviolet light in the universe. Those factors are the reddening of light due to the expansion of space, the universe’s dynamic nature, and the absorption of light by intergalactic dust and gas. All combined, this keeps the night sky dark to our vision.

The sky is literally covered in galaxies! Mind boggling to be sure!

A Young Globular Cluster

by Leave a Comment

Youthful NGC 362 Globular Cluster

Earlier this week NASA released this dazzling image of NGC 362. It is one of about 150 known globular clusters on the outskirts of our own galaxy, the Milky Way. Globular clusters are giant spheres that contain hundreds of thousands of stars and reside in the outskirts of galaxies. The ESA says NGC 362 is unusual:

By studying the different elements present within individual stars in NGC 362, astronomers discovered that the cluster boasts a surprisingly high metal content, indicating that it is younger than expected. Although most globular clusters are much older than the majority of stars in their host galaxy, NGC 362 bucks the trend, with an age lying between 10 and 11 billion years old. For reference, the age of the Milky Way is estimated to be above 13 billion years.

This image, in which you can view many of NGC 362’s individual stars, was taken by Hubble’s Advanced Camera for Surveys (ACS) If you want a new desktop image, here’s the 42 MB full-size original (it will automatically download).