100% mobile compatible
Observatory Parameters
Dec 14
Lat. 39.0, Lon. -77.5
Clouds: Seeing:
Waning Crescent
03:46 14:54
Astronomy Planning Made Easy

What's in Ashburn's Sky Tonight?

  • Planets
  • Asterismsby: magnitude size rise transit
  • Dark Nebulaeby: magnitude size rise transit
  • Diffuse Nebulaeby: magnitude size rise transit
  • Galaxiesby: magnitude size rise transit
  • Galaxy Clustersby: magnitude size rise transit
  • Globular Clustersby: magnitude size rise transit
  • Nebulaeby: magnitude size rise transit
  • Open Clustersby: magnitude size rise transit
  • Planetary Nebulaeby: magnitude size rise transit
  • Supernovaeby: magnitude size rise transit
  • Astrophotography Community
    Latest Picturesbrowse all...

    Upload Your Astrophotography

    What Users Think
    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
    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
    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
    Amazing work! What a helpful tool for planning observing sessions. Absolutely wonderful.
    Nick, United States
    Thanks for implementing the “Telescope Simulator”. Superb feature!
    Paul, England
    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
    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
    I think this site is a god send. I use it all the time for planning what I am going to image.
    James, England

    Astronomy Articles

    · Universe Today

    NASA’s Opportunity Rover Withstands Another Harsh Winter on Mars

    Having survived its eight winter in a row, the Opportunity rover continues to operate long past its original, anticipated lifespan. The post NASA’s Opportunity Rover Withstands Another Harsh Winter on Mars appeared first on Universe Today.
    · Universe Today

    Meteors Explode from the Inside When They Reach the Atmosphere

    A new study from Purdue University indicates that Earth's atmosphere will break up small meteoroids, which is good news for planetary protection The post Meteors Explode from the Inside When They Reach the Atmosphere appeared first on Universe Today.
    · Space.com

    Mystery of Whale and Dolphin Strandings May Hinge on NASA Data

    Are huge balls of charged gas launched from the sun steering these marine animals off course?
    · Space.com

    Why This Explosive, Mars-Like Volcanic Island Fascinates NASA

    Life on Mars may have looked a lot like Tonga.
    · Space.com

    Humanity's Expansion into Deep Space Is Inevitable, Industry Experts Say

    There will be a market for humanity's expansion beyond Earth orbit, industry experts said — but none of them can predict what form that market will take.
    · Space.com

    Ursid Meteor Shower 2017: When, Where & How to See It This Month

    The Ursid meteor shower will peak in the early morning on Dec. 22, 2017, but it won’t be a very spectacular shooting-star show.
    · Space.com

    Geminid Meteor Shower 2017: When, Where & How to See It Tonight

    The Geminid meteor shower peaks on Dec. 13. This guide tells you the best times and places to see these shooting stars (no equipment necessary).
    · Space.com

    Space Calendar 2017: Launches, Sky Events & More

    Here's a guide to the major astronomical events of the next year, as well as space launches and milestones for spacecrafts already in travel.

    Astronomy Quote of the Day

    “The Cosmos is all that is or ever was or ever will be. Our feeblest contemplations of the Cosmos stir us — there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, or falling from a height. We know we are approaching the greatest of mysteries.” Carl Sagan
    Astronomy Planning Made Easy. Learn more.