Astronomy Picture of the Day . Grand Design Spiral Galaxy NGC 2997 . ... NGC 2997 is a grand design spiral galaxy. ... Much was learned recently about Neptune's weather by the release last week of time-lapse pictures of the most distant gas giant in our Solar System. ... In this just-released nighttime picture of Jupiter's moon Io, the red spots clearly show Io's current volcanically active regions. ... This is what it would look like to fly over the surface of Jupiter's moon Ganymede. ...