Stillwater Star Gazers
Stillwater Star Gazers
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Astronomy Links

This is a collection of useful web sites. Please feel free to comment on the collection. I will keep this updated based on input.

Member’s Sites

  • Clear Sky Clocks
  • Clear Sky Alarm Clock
  • Tonight’s Sky

News

  • Universe Today
  • Phys.org’s Space News section
  • Spaceflight Now
  • Space.com
  • Hubble News
  • Sky & Telescope
  • Astronomy Now
  • Astronomy
  • NASA TV

Reference

  • Cloudy Nights
  • Telrad Messier Maps
  • Orbital Elements
  • Students for the Expolration and Development of Space
  • ClearSkies.NL
  • Dark Sky Map (2006 data)
  • Dark Sky Map (Newer data)
  • Sky Marvels

Space telescopes

  • SOHO (Observing the Sun 24/7)
  • Hubble
  • Spitzer (Infrared Telescope)
  • Chandra (X-Ray telescope)

What’s up?

  • Tonight’s Sky
  • Satellite tracking
  • Meteor showers
  • Meteor shower calendar
  • This week’s comets
  • Your Sky
  • The Celestial Observer
  • The Current Arora
  • On-line Sky Map
  • The Night Sky

Want to spend some money?

  • Surplus Shed
  • Astromart

Software

  • Astro Helper
  • Jupiter 2
  • Neat Java Applets
  • Moon Atlas
  • My Stars
  • Cartes du Ciel
  • Hallo Northern Sky
  • NexStar compatible software
  • RTGUI
  • Sky Tools
  • What’s Up

Astro imaging

  • AstroBin
  • Image processing primer
  • Multiple topic articles
  • Mounts for imaging

Astro imaging software

  • Astro Snap
  • Backyard EOS
  • Nebulosity
  • Astro Tortilla
  • Star Tools
  • PHD Guiding
  • Deep Sky Stacker
  • RegiStax
  • Planetary Image Pre-Processor
  • ExCalibrator

Help professional scientists

  • Classify Galaxies

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  • Cover for Stillwater Stargazers
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    Stillwater Stargazers

    Stillwater Stargazers

    We are astronomers in the Troy, Ohio area.

    Stillwater Stargazers

    1 week ago

    Stillwater Stargazers
    www.facebook.com/share/p/14PBsUFx52i/We may be living inside one of the largest known voids in the universe.Astronomers have long puzzled over the “Hubble Tension” – the fact that the universe appears to expand at different rates depending on how you measure it. Distant light from the early universe suggests a slower expansion, while local measurements from supernovae and Cepheid stars show a faster one.Now, a study supports a striking possibility: Earth may be inside a 2-billion-light-year-wide void – a cosmic underdensity known as the KBC supervoid – and it might be distorting our measurements of the universe itself.Here’s how it works: In standard cosmology, the universe is assumed to be roughly uniform on large scales – with galaxies, dark matter, and gas evenly spread. But the KBC supervoid violates that assumption. It’s an enormous region with fewer galaxies and less matter than average.Light traveling from distant galaxies toward us passes through this low-density region. As it does, the gravitational influence of the void causes subtle changes in how the light stretches – an effect known as the Integrated Sachs-Wolfe effect. That stretch can make galaxies seem like they’re moving away from us faster than they are, skewing local estimates of the Hubble constant upward.This might explain why local measurements show ~45 miles per second per megaparsec (73 km/s/Mpc), while early-universe data points to ~42 (67 km/s/Mpc).But the implications go deeper. According to the standard ΛCDM model – which includes dark energy and cold dark matter – a void this large and empty shouldn’t exist. That has led some researchers to explore alternative theories like Modified Newtonian Dynamics (MOND), which tweaks gravity instead of invoking invisible dark matter.If confirmed, the KBC supervoid would be more than just a cosmic curiosity. It would mean our measurements of the universe’s expansion – and possibly even our theories of gravity – need a second look.Read the study:"A simultaneous solution to the Hubble tension and observed bulk flow within 250 h−1 Mpc." Monthly Notices of the Royal Astronomical Society, 2024. ... See MoreSee Less

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    Stillwater Stargazers

    1 week ago

    Stillwater Stargazers
    www.facebook.com/share/p/1BB9HCsecx/Mark your calendars tonight, October 21, 2025 — a night that could go down in history! ☄️ The mysterious Comet C/2025 A1 is heading our way, passing even closer than the Moon. This ancient traveler from the far reaches of the Solar System hasn’t graced our skies for nearly 15,000 years.As it draws near, sunlight will ignite its icy surface, creating a brilliant glowing tail that may be visible for weeks — shining brighter than most stars.Read more: www.science.sbtechem.com/?p=548 ... See MoreSee Less

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    Stillwater Stargazers

    3 months ago

    Stillwater Stargazers
    Europe has levelled a mountain to build $1,000,000,000 telescope that will become largest optical telescope on Earth ... See MoreSee Less

    Europe has levelled a mountain to build $1,000,000,000 telescope that will become largest optical telescope on Earth

    www.uniladtech.com

    Multiple European nations have come together to build the largest optical telescope on Earth but it'll cost $1,000,000,000 and they have to level a mountain
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    Stillwater Stargazers

    7 months ago

    Stillwater Stargazers
    www.msn.com/en-us/news/technology/basics-of-astrophotography-everything-you-need-to-know-to-take-... ... See MoreSee Less

    Basics of Astrophotography | Everything You Need To Know To Take Your First Night Sky Photos, TODAY

    www.msn.com

    Photographing the Milky Way: a rite of passage for every landscape photographer, and truly the pinnacle of capturing the beauty of our planet. It doesn't have to be scary, and it certainly doesn't hav...
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    Stillwater Stargazers

    8 months ago

    Stillwater Stargazers
    www.astroleague.org/outreach/?fbclid=IwY2xjawInaoNleHRuA2FlbQIxMQABHV5F0cHmam_pRIkYQp6WJApXpY-1F5... ... See MoreSee Less

    What are Outreach Downloads? (New poster added July 8) - Astronomical League

    www.astroleague.org

    “What telescope should I buy?” “How can I learn my way around the night sky?” “What can I see with my telescope?” Outreach is all about connecting with the public. The Astronomical League ...
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