NASA's TESS mission reveals the puffiest planets ever found

HANDOUT - 26 June 2026, ---: An illustration made available by NASA shows the Sun-like star TOI-791 and two giant planets orbiting it, which were discovered by NASA's TESS space telescope discovered. These planets, designated TOI-791 b and TOI-791 c, are roughly the size of Jupiter but a tiny fraction of its mass, meaning they have an extraordinarily low density. Photo: Daniel Rutter/NASA/dpa - ATTENTION: leer más editorial use only and only if the credit mentioned above is referenced in full leer menos