A vast, magnetically tangled sunspot has rotated into direct view of Earth, raising the prospect of powerful solar eruptions in the coming days. The active region is large enough to dwarf our planet ...

The Planetary Health Check is a key monitor of earth's vital signs—and will guide action for a more sustainable world.

One of the largest sunspot formations of the past several years is currently visible on the sun. The group, catalogued as AR 4294-4298, is so large that several of the dark regions exceed the Earth’s ...