NGC 4490 - 20.3.2020 at 21.00 - 20.3.2020 at 22.00 Helsinki Observation number 89801

• Observation target
• • Deep space object
• Designation
• • NGC 4490
• • Näyttävä
• Constellation
• • Canes Venatici
• Field of view
• 0.531 degrees

• Magnification
• • 54
• Galaxies
• • Galaxy cluster

    In a galaxy cluster there are tens or hundreds of galaxies. Typically a moderate big instrument is needed to see galaxy clusters.

     

    

    The galaxy cluster Hickson 44 in Leo in composed of four galaxies. Image Timo Inkinen.

  • Spiral galaxy

    Spiral galaxy is a stellar system where there are outwards arched spiral arms from roundish (spiral galaxies) or bar-shaped (barred spiral galaxies) central condensation.

    The apparent shape of spiral galaxied depends on out observation direction. From above they are quite round. From the side they lens-shaped with a bulge in the middle.

    Generally a rather large instrument, good weather conditions and observational expereince are needed to see spiral arms. Usually spiral galaxies look like a fuzzy spots.

    

    Spiral galaxy M33 in Triangulum. Image Tero Turunen.

     

    

    Andromeda Galaxy M31. There are also galaxies M110 (upper right corner) and M32 (lower left corner) in this image. Image Pekka Peura.
    
    

    

    M101 aka Pinwheel Galaxy in Ursa Major. Image Samuli Vuorinen.

     

    

    Spiral galaxy IC 342 aka Hidden Galaxy in Camelopardalis. Image Timo Inkinen.
    
    

    

    A sketch of spiral galaxy NGC 7331 in Pegasus. Image Juha Ojanperä.

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