- Hudson is a city and county seat of St. Croix County, Wisconsin, United States. As of the 2020 United States census, its population was 14,755. It is part of the Minneapolis–St. Paul Metropolitan Statistical Area (MSA). The village of North Hudson is directly north of Hudson.
- How to find and observe NGC457 (TOTS#3) (eyesonthesky.com)
NGC 457 is an open cluster within our own Milky Way galaxy. It is over 7,900 light years from Earth, so the photons from it reaching your eye in a telescope left that cluster about the time copper was first being used in the Middle East. The estimated age is about 21 million years, making it one of the younger star clusters in our galaxy. Here is how to locate it.