Year: 2024

Picture Parade Four Hundred and Thirty-Four

A change from our dear dogs.

I really hope you enjoy these as much as we have!

There is quite a long introduction but it helps enormously in explaining the background to the photographs.

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This image is released as part of the Early Release Observations from ESA’s Euclid space mission. All data from these initial observations are made public on 23 May 2024 – including a handful of unprecedented new views of the nearby Universe.

The Dorado Group of galaxies is one of the richest galaxy groups in the southern hemisphere. Here, Euclid captures signs of galaxies evolving and merging ‘in action’, with beautiful tidal tails and shells visible as a result of ongoing interactions. As Dorado is a lot younger than other clusters (like Fornax), several of its constituent galaxies are still forming stars and remain in the stage of interacting with one another, while others show signs of having merged relatively recently. In size, it sits between larger galaxy clusters and smaller galaxy groups, making it a useful and fascinating object to study with Euclid.

This dataset is enabling scientists to study how galaxies evolve and collide over time in order to improve our models of cosmic history and understand how galaxies form within halos of dark matter, with this new image being a true testament to Euclid’s immense versatility. A wide array of galaxies is visible here, from very bright to very faint. Thanks to Euclid’s unique combination of large field-of-view and high spatial resolution, for the first time we can use the same instrument and observations to deeply study tiny (small objects the size of star clusters), wider (the central parts of a galaxy) and extended (tidal merger tails) features over a large part of the sky.

Scientists are also using Euclid observations of the Dorado Group to answer questions that previously could only be explored using painstakingly small snippets of data. This includes compiling a full list of the individual clusters of stars (globular clusters) around the galaxies seen here. Once we know where these clusters are, we can use them to trace how the galaxies formed and study their history and contents. Scientists will also use these data to hunt for new dwarf galaxies around the Group, as it did previously with the Perseus cluster.

The Dorado Group lies 62 million light-years away in the constellation of Dorado.

All images are: ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre (CEA Paris-Saclay), G. Anselmi

Composite image of five astronomical views, three at the top, two at the bottom. All are dotted with stars and galaxies against a black background. Striking features are three bright glowing structures in the first image. The second image has an orange veil-like structure spanning across. In the third we see a stunning spiral galaxy with many arms. The fourth image features light from galaxies lying behind a bright cluster distorted into arcs. And the fifth image shows a variety of galaxies in all shapes and sizes

An elongated bright cloudy ellipse, tilted at a 45-degree angle in front a black background dotted with small white stars and galaxies. Above the ellipse floats a smaller, cloudy ellipsoid.

A dark orange filamentary structure seems to enclose stars. Centrally, three bright star-forming regions shine brightly through the orange veil in a traffic-light like formation.

The image shows hundreds of stars, some brighter than others. The stars seem to light up their cloud-like surroundings in purple. A darker structure spans the image in an arch from upper left to bottom right. The bottom of this arch runs into dense clouds forming the darkest part of the image.

This breathtaking image features Messier 78 (the central and brightest region), a vibrant nursery of star formation enveloped in a shroud of interstellar dust. This image is unprecedented – it is the first shot of this young star-forming region at this width and depth.

Today, (May 23rd, 2024) ESA’s Euclid space mission releases five unprecedented new views of the Universe. The never-before-seen images demonstrate Euclid’s ability to unravel the secrets of the cosmos and enable scientists to hunt for rogue planets, use lensed galaxies to study mysterious matter, and explore the evolution of the Universe.

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Fabulous. It is an example of just how clever the science is getting!

I can only look at these images in awe. For example, Messier 78 is part of the Orion constellation, has a radius of five light-years, and is only 1,600 light-years from Planet Earth. (Using the figure from below of the distance of a single light-year, that puts Messier 78 as 1,600 times 6 trillion miles from our planet or 9,600 trillion miles.)

And in case you forgot it, one light year is:

The light-year is a measure of distance, not time. It is the total distance that a beam of light, moving in a straight line, travels in one year. To obtain an idea of the size of a light-year, take the circumference of the earth (24,900 miles), lay it out in a straight line, multiply the length of the line by 7.5 (the corresponding distance is one light-second), then place 31.6 million similar lines end to end. The resulting distance is almost 6 trillion (6,000,000,000,000) miles!

Having pets!

But primarily for companionship.

I chose this article from The Conversation simply because it is the truth about having a pet animal.

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Pets give companionship, cuddles and joy – and also unavoidable stresses

Pets can bring joy and companionship, as well as financial worries, loss and logistical challenges. Dann Tardif/Stone via Getty Images

Emily Hemendinger, University of Colorado Anschutz Medical Campus

Owning a pet can be a roller coaster. There are the highs, like when your dog greets you with a full-body wiggle when you return home, or when your cat purrs loudly as you cuddle next to one another. Then there are the lows, like stressful trips to urgent care, waking up to that unpleasant vomiting noise, or making the difficult choice to say goodbye because of medical problems or even intractable behavioral issues.

For those pet-owners who are struggling, it’s beneficial to their mental health to acknowledge that pets can create stress and that some animals are more work than others.

Research has shown that both cats and dogs can have equally positive impacts on mental health.

Pets may be helpful at reducing stress, anxiety and feelings of being overwhelmed, including in children. Pet ownership has also been shown to improve well-being by instilling people with a sense of purpose and responsibility.

As a licensed clinical social worker, animal lover and proud dog mom, I have both professionally and personally seen the mental health impacts of having animal companions.

Media stories commonly cover the positives of pet ownership. But the hardships and downsides of owning a pet are not discussed as often. For instance, while there are many positive aspects to pet ownership, some research is showing that pets may lead to exacerbated mental health concerns or even sleep issues.

Whether you’re adopting or shopping, pets can bring a full range of emotions into our lives. Research has even shown that pets may benefit non-pet owners around them as well.

How pets can enrich our lives

A pet owner may easily be able to tick off an infinite number of positive effects their fuzzy companion has had on their life. Research backs them up.

Pets can provide constant companionship for individuals and families. This is particularly true for older adults. There was an uptick in adoptions of pets during the early days of the COVID-19 pandemic. Many people benefited from pets during periods of stay-at-home mandates and quarantines.

Pet adoptions soared during the early days of the COVID-19 pandemic. But many owners then found themselves struggling with the rising costs of care.

Research shows that dogs can reduce loneliness in their owners. In fact, being accompanied by a dog may even make you seem more approachable.

Pets, especially dogs, may help improve one’s ability to socialize and feel connected with others, as well as increasing the prospects for social interactions. People may bond over the experience of having pets, socialize at the dog park, or even meet up at the local cat café.

Animals and pets have also been used to assist in detecting the onset symptoms of medical episodes, including seizures. Animal-assisted therapy and pet therapy have shown promise in improving symptom management and overall quality of life in a number of conditions, including trauma and stressor-related disorders, anxiety disorders, eating disorders, autism, traumatic brain injuries, neurological disorders and more.

There are ample benefits to pet ownership.

The inherent stressors

Despite the many positive impacts of pet ownership, it also can have negative impacts. For example, one survey found that 47% of Americans felt separation anxiety when leaving their dogs at home.

The survey also found that 41% of pet owners declined social invitations because they did not want to leave their dog at home, and that 70% of pet owners would prefer to work remotely so they could stay at home with their pet. Pet owners have also identified feeling anxious about their pet getting sick or running away, or the risk that they might harm the animal unintentionally.

Stress from pet ownership is common. There’s the stress of house-training and making sure the pet is getting enough enrichment – both physically and mentally. Then there are the challenges associated with vet appointments and navigating illness, as well as financial stressors and finding pet sitters.

Another element of pet ownership that people often don’t talk about is the stress, and often shame, that owners with reactive dogs experience from walking their dog, having people over to the house or having their dog around children.

Finally, there’s the reality that our pet companions live shorter lives than we do, leading to end-of-life planning, expensive treatments for older-age ailments, and, of course, the grief that will be felt from the loss of a pet. For some people, the loss of a pet may feel worse than human loss.

People may judge or criticize pet owners for an “overblown” grief reaction. The common experience of invalidation and lack of acknowledgment related to grief around pet loss – similar to the grief felt from divorce and miscarriage – is categorized as disenfranchised grief. This term refers to grief that is not acknowledged, validated or accepted socially.

Young man sits in front of his laptop and puts his nose up to the nose of his cat.
Society often fails to recognize the significance of pets in people’s lives. Thomas Northcut/DigitalVision via Getty Images

Strings attached

Pet owners, especially post-pandemic, have reported high levels of guilt related to leaving their pets at home while at work or social events. Some of this guilt may be related to concerns about providing insufficient attention to the pet or about the pet’s health. This guilt has even been shown to be similar to the feeling human parents have concerning their human children.

As someone who adores their dog, I can relate to the guilt of leaving him alone. To complicate things, my dog has joint issues, anxiety and discoid lupus, a type of lupus that affects the skin on his nose. He can also be reactive. All of these aspects require me to provide extra care. When friends invalidate my worries and guilt, it can feel isolating and shaming.

And I’m not alone in these feelings. Overall, when there is a lack of consideration for the complex feelings pet owners experience, the invalidation and disenfranchised feelings can lead to depression, anxiety, feelings of being isolated and worsened quality of life.

Woman sits on a dock with her arm around her dog, which looks backward over her shoulder into the camera.
Many pet owners report feeling unsupported and invalidated when it comes to the grief around illness, loss and other complicated issues that come with pet ownership. LWA/DigitalVision via Getty Images

Finding support

The human-animal bond is unique, with humans receiving unconditional love and full acceptance from their animal companion. When society can honor and respect this bond through validation, patience and compassion, it not only helps pet owners but also the clinicians who treat the animals.

Employers can be supportive by continuing to provide remote and hybrid work options, flexibility in scheduling and opportunities for employees to feel validated and receive support. If a loved one is experiencing guilt around leaving their dog at home or a friend is having anxiety about their cat’s health, instead of minimizing their experience, try talking to them and asking how best to support them through their distress.

Another support tool is encouraging pet owners to practice self-compassion and mindfulness, being present and focusing on the time they do have with their pet.

Pets can bring infinite joy and companionship to our lives, whether that’s through pet ownership, fostering, volunteering or engaging in animal-assisted therapy.

It remains important, however, to acknowledge the stressors and difficulties pet owners face. After all, the ups and downs of pet ownership, just like the ups and downs of the human experience, are what make life and relationships that much more meaningful.

Emily Hemendinger, Assistant Professor of Psychiatry, University of Colorado Anschutz Medical Campus

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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This is such a good article both for the general readership and for Jeannie and me specifically. For when I met Jean in December, 2007 Jean had 23 dogs and 7 cats. Jean’s passionate interest was in rescuing the many street dogs that roamed San Carlos in Mexico.

My great love of dogs came from the loving companionship that the animals offered me, including my Pharaoh that I brought with me from England. Now we are down to just two dogs: Oliver and Cleopatra.

The Quantum Field Theory

This is on the edge of my understanding!

Patrice Ayme recently posted an essay called Relativistic Length Contraction Busts Helium3! As I said in my comment to that post:

“This is far ahead of my knowledge of science. I applaud you for writing this despite me not understanding it”

So it may seem a little strange that I now publish the following. It was published originally on Skeptic. It is quite a long video but, please, settle down and watch it.

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Sean Carroll is creating a profoundly new approach to sharing physics with a broad audience, one that goes beyond analogies to show how physicists really think. He cuts to the bare mathematical essence of our most profound theories, explaining every step in a uniquely accessible way.

Quantum field theory is how modern physics describes nature at its most profound level. Starting with the basics of quantum mechanics itself, Sean Carroll explains measurement and entanglement before explaining how the world is really made of fields. You will finally understand why matter is solid, why there is antimatter, where the sizes of atoms come from, and why the predictions of quantum field theory are so spectacularly successful. Fundamental ideas like spin, symmetry, Feynman diagrams, and the Higgs mechanism are explained for real, not just through amusing stories. Beyond Newton, beyond Einstein, and all the intuitive notions that have guided homo sapiens for millennia, this book is a journey to a once unimaginable truth about what our universe is.

Sean Carroll

Sean Carroll is Homewood Professor of Natural Philosophy at Johns Hopkins University, and Fractal Faculty at the Santa Fe Institute. He is host of the Mindscape podcast, and author of From Eternity to HereThe Particle at the End of the UniverseThe Big Picture, and Something Deeply Hidden. He has been awarded prizes and fellowships by the National Science Foundation, NASA, the American Institute of Physics, the Royal Society of London, and many others. He lives in Baltimore with his wife, writer Jennifer Ouellette. His new book series, The Biggest Ideas in the Universe, includes one volume on Space, Time, and Motion, and this new volume on Quanta and Fields.

Shermer and Carroll discuss:

  • the measurement problem in physics
  • wave functions
  • entanglement
  • fields
  • interactions
  • scale
  • symmetry
  • gauge theory
  • phases
  • matter
  • atoms
  • What is time?
  • Is math all there is? Is math universal?
  • double-slit experiment
  • superposition
  • metaphors in science
  • limitations of models and theories of reality
  • What banged the Big Bang?
  • Why is there something rather than nothing?
  • Second Laws of Thermodynamics and directionality in nature
  • Is there a place for God in scientific epistemology?
  • many interpretations of quantum mechanics
  • multiple dimensions and the multiverse
  • string theory and the multiverse
  • known unknowables: Are there things we can never know, even in principle?
    • God
    • hard problem of consciousness
    • free will/determinism.

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I’m assuming you have watched the video because in a world that is pre-occupied with the trivial this is just the opposite. Sean shares his physics in a profoundly different and powerful way!