Back M31Andromeda Galaxy Click to display the full resolution Object InfoTypeSpiral GalaxyConstellationAndromedaDistance2,900,000 ly Capture DetailsDateSeptember 3, 2014LocationPalomar Mountain, CAExposureISO 800, 20x180s EquipmentOpticsTakahashi FS-60C RefractorFocal Length285mm @f/4.8MountAstro-Physics 900GTOCameraCanon 5D Mark IIISoftwareCCDStack, Photoshop