New results from NASA's Hubble Space Telescope reveal that a young star, FU Orionis (FU Ori), is circled by a disk of material that is much hotter than expected—16,000 Kelvin, or nearly three times our Sun's surface temperature. That sizzling temperature is nearly twice as hot as previously believed. Young stars like FU Ori go through eruptive fits that lead to dramatic changes in brightness. These growing stars accumulate mass by tugging on material from surrounding disks and nebulas, a