NASA's Ingenuity helicopter captured a bird's-eye view of human-made space junk on another planet — the landing gear that helped it, and the Perseverance rover, get to the red planet. The 4-pound … [+3584 chars]
The light of an exploding star changes rapidly over time. The light from the supernova gets brighter and reaches its peak, and then starts to deam. It is necessary to note the times of these peaks a… [+6587 chars]
