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#astronomy

314 posts212 participants1 post today
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Universo Mágico

#UMPlus - Einstein Ring in Hydrus

universomagico.net/2025/04/ani

The James Webb Space Telescope has captured a rare cosmic phenomenon called the Einstein Ring. What at first appears to be a single, oddly shaped galaxy is actually two galaxies separated by a great distance. The closer foreground galaxy is at the center of the image, while the more distant background.....
#astronomy #space #astrophysics #astrophotography

Einstein Ring in Hydrus
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Josh Universe :goldverify:

SpinLaunch to Develop Meridian Space Satellite Network

Summary: SpinLaunch, known for its innovative launch methods, announced a €122.5 million contract with Kongsberg NanoAvionics to build 280 satellites for its Meridian Space broadband constellation, signaling its competitive market entry using advanced technology and strategic partnerships.

Read More: https://blog.joshuniverse.com/spinlaunch-to-develop-meridian-space-satellite-network

@science@lemmy.world @space@lemmy.world @science@lemmy.ml @space@newsmast.community @space@lemmy.ml #space #science #nasa #astronomy

Josh Universe · SpinLaunch to Develop Meridian Space Satellite NetworkSpinLaunch and Kongsberg partner for 280 satellites, advancing Meridian Space's broadband constellation with €122.5M contract.
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Josh Universe :goldverify:

Asteroid 2024 YR4: Moon Collision Risk Rises

Summary: A recent study shows asteroid 2024 YR4, initially feared to strike Earth, now has a 4% chance of hitting the Moon. The James Webb Space Telescope revised its collision probability, reassuring Earth safety but sparking Moon impact concerns, highlighting the importance of planetary defense.

Read More: https://blog.joshuniverse.com/asteroid-2024-yr4-moon-collision-risk-rises

@science@lemmy.world @space@lemmy.world @science@lemmy.ml @space@newsmast.community @space@lemmy.ml #space #science #nasa #astronomy

Josh Universe · Asteroid 2024 YR4: Moon Collision Risk RisesAsteroid 2024 YR4 poses a 4% collision risk with the Moon by 2032, offering scientific opportunities and defense strategy insights.
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AllanICarswellObservatory
Killarney Provincial Park and the Allan I. Carswell Observatory present the Astronomer in Residence (AIR) program, an astronomy outreach endeavour! This is an exciting chance to share your love of astronomy in the wonderful outdoors of the dark sky site at Killarney Provincial Park. Be a part of live, in-person tours as well as remote events, and share your adventures on the Astronomer in Residence Blog.
Perks: Limited stipends available ($400/week). Be sure to note in your application if this is a limiting factor!
For more information or to apply visit https://www.yorku.ca/science/observatory/air/


#AstronomyOutreach #DarkSkySite #Killarney #AstronomerInResidence #AllanICarswellObservatory #YorkU #Toronto #Ontario #Astronomy #Astronomer #Science #Astrophotography #Opportunity
#opportunity
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Josh Universe :goldverify:

Moon Dust Solar Cells for Space Exploration

Summary: Solar cells made from simulated moon dust may provide sustainable energy for lunar bases. These cells are efficient and resistant to radiation, reducing the need for heavy supplies from Earth. This innovation could significantly decrease transport costs and enable long-term lunar habitation.

Read More: https://blog.joshuniverse.com/moon-dust-solar-cells-for-space-exploration

@science@lemmy.world @space@lemmy.world @science@lemmy.ml @space@newsmast.community @space@lemmy.ml #space #science #nasa #astronomy

Josh Universe · Moon Dust Solar Cells for Space ExplorationResearchers explore using moonglass and lunar regolith for solar cells, reducing costs and enabling sustainable lunar habitats.
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Gravity Grinch

Here is a new review paper that I am also part of on the tensions in cosmology:
arxiv.org/abs/2504.01669

As one of my dear collaborators phrased it: 500+ authors wrote 400+ pages on the issues with the cosmological concordance model. So can we still say that LCDM is fine?!
I also contributed because I think that the sum of all issues should make us rethink the 100-yo model.

arXiv logo
arXiv.orgThe CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physicsThe standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades. This concordance model is constructed by a universal cosmological constant and supported by a matter sector described by the standard model of particle physics and a cold dark matter contribution, as well as very early-time inflationary physics, and underpinned by gravitation through general relativity. There have always been open questions about the soundness of the foundations of the standard model. However, recent years have shown that there may also be questions from the observational sector with the emergence of differences between certain cosmological probes. In this White Paper, we identify the key objectives that need to be addressed over the coming decade together with the core science projects that aim to meet these challenges. These discordances primarily rest on the divergence in the measurement of core cosmological parameters with varying levels of statistical confidence. These possible statistical tensions may be partially accounted for by systematics in various measurements or cosmological probes but there is also a growing indication of potential new physics beyond the standard model. After reviewing the principal probes used in the measurement of cosmological parameters, as well as potential systematics, we discuss the most promising array of potential new physics that may be observable in upcoming surveys. We also discuss the growing set of novel data analysis approaches that go beyond traditional methods to test physical models. [Abridged]
#astronomy#astrophysics#Cosmology
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Leander Hutton
I think I finally have the LX90 good to go. It's not a great photography platform. The forks struggle with a small D7500 hanging off a focal reducer. I do still need to modify my adapter plate for the EQ wedge.

Takes a while for any vibration to die down but for visual work it's fine. Went through a number of Messier objects last night.

Seeing was pretty bad, you could see the atmosphere rolling through the camera but I did manage a single clear-ish shot of the moon! #astronomy #astrophotography #moon #darktableedit
Meade catadioptric telescope with the sky and moon in the distant background.
Thin crescent moon, nearly filling the frame. Craters are clearly visible.
#darktableedit
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