The International Astronomical Union (IAU) defined a dwarf planet in 2006 as a celestial body that orbits the Sun, is round in shape, but has not cleared its orbital neighborhood of objects of ...

Bigger than a planet? Smaller than an atom? Size comparison videos are all the rage and may scratch a very old itch. By Jenny Marder Not long ago, my 7-year-old son looked up from a picture he was ...

I’m writing this on Earth Day 2023, at a time when too many kids have deep worries about the future, and when most people realize that kids, communities, and the planet need more of the confidence, ...

WISPIT 2b, a gas giant five times more massive than Jupiter, is the first planet of its kind to be observed growing inside ...

Gallery Kids is set to publish a new young-fiction series of Postman Planet books from author Ben Davis. Tierney Holm, senior editor for Gallery Kids, an imprint of Simon & Schuster Children’s Books, ...