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Observatory Parameters
Sep 20
Lat. 39.0, Lon. -77.5
Clouds: Seeing:
New Moon
07:11 19:43
Astronomy Planning Made Easy

What's in Vienna's Sky Tonight?

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  • Globular Clustersby: magnitude size rise transit
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  • Open Clustersby: magnitude size rise transit
  • Planetary Nebulaeby: magnitude size rise transit
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    What Users Think
    I just started using the DSO Browser and I am impressed. This is an original idea put to work on an outstanding platform. I find it very useful to plan observations and photo sessions. The hourly elevation and the monthly elevation graphs are awesome and helpful. I plan to use it on a regular basis.
    Federico, Venezuela
    This continues to be the best resource of its type, now become essential for me for researching and choosing imaging targets. It means a lot less wasted time than there was. It's hard to think of any way in which this app can be improved, it does so much and so well.
    James, England
    Amazing work! What a helpful tool for planning observing sessions. Absolutely wonderful.
    Nick, United States
    Very great job with your website, I'm using it constantly since I found it! It's really that good, thank you!
    Sergio, Israel
    I love the site! It is my favorite “go-to” for session list generation and looking for DSO info.
    Andrey, United States
    Thanks for implementing the “Telescope Simulator”. Superb feature!
    Paul, England
    I think this site is a god send. I use it all the time for planning what I am going to image.
    James, England
    I've been using this for a while now and it's an amazing and educational venture! I urge any and all finding this to join in. Two things I look for on the net: beautifully done and free-of-charge. The DSO Browser passes this test with (truly) flying-colors!
    Dave, United States
    Thank you for creating this wonderful site, it is my favorite and I always use it. I've been to a lot of astronomical websites and so far this is the best one I've seen.
    Brandon, United States

    Astronomy Articles

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    Venus Express Probe Reveals the Planet’s Mysterious Night Side

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    Carnival of Space #527

    This week’s Carnival of Space is hosted by Brad Rogers at The Evolving Planet blog. Click here to read Carnival of Space #527. And if you’re interested in looking back, here’s an archive to all the past Carnivals of Space. If you’ve got a space-related blog, you should...
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    Watch Hurricane Maria in Action in These NASA and NOAA Gifs

    Satellites operated by NASA and the National Oceanic and Atmospheric Administration (NOAA) are tracking Hurricane Maria from space you can see some of those observations below, shared by the agencies on social media.
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    Image of the Day

    Before NASA's Cassini spacecraft dove into Saturn last Friday (Sept. 15), it bade farewell to Iapetus, one of Saturn's "Pac-Man" moons. Also known as the "yin-and-yang" moon, Iapetus is bright on one side and dark on the other.
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    Halley's Comet: Facts About the Most Famous Comet

    The comet's frequent recurrence has played a part in historical events for millennia.
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    Planet Venus Facts: A Hot, Hellish & Volcanic Planet

    Venus is the brightest planet in our solar system, has a hellish atmosphere, and is covered in volcanoes. Learn more about planet Venus here.
    · Space.com

    Jaw-Dropping Jupiter: Juno Probe Snaps Dramatic Up-Close Views of Planet

    New photos by NASA's Juno spacecraft capture the solar system's largest planet in all its complex glory.

    Astronomy Quote of the Day

    “Listen; there's a hell of a good universe next door: let's go.” E. E. Cummings
    Astronomy Planning Made Easy. Learn more.