Earth’s gravity has a lot to do with what people think is up and what is down. Things fall down toward the ground, but that direction depends on where you are.
Space has a knack for bending our sense of scale. The Moon feels close enough to touch—after all, we see its craters with nothing but our eyes. Yet, that 238,855-mile gap between Earth and its lunar ...
Who’s ready for a “planet parade”? The last planetary alignment was in August 2025, when six planets aligned and four were ...
The Sun makes Earth habitable, governs its climate and drives a variety of natural phenomena through its variable magnetism. Indeed, all planets in and outside the Solar System exist under the ...
Venus and Jupiter make good targets for skywatchers this month.
Professor of Earth, Environmental, and Planetary Sciences, University of Tennessee If you’ve seen illustrations or models of the solar system, maybe you noticed that all the planets orbit the Sun in ...