The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

The new record was achieved on a 9cm2 tandem perovskite silicon solar cell compared to most records achieved on 1cm2 cells.

NASA’s Solar Dynamics Observatory (SDO) has detected a colossal coronal hole on the Sun’s surface, stretching an estimated 500,000 miles across—a size equivalent to 62 Earths lined up side by side.