Simplify the following text for a Grade 14 native English-speaking person.
Original: In more recent times , improvements in the telescope and the use of unmanned spacecraft have enabled the investigation of geological phenomena such as mountains and craters , and seasonal meteorological phenomena such as clouds , dust storms and ice caps on the other planets .
Simplified: More recently , telescopes and spacecrafts have led to discoveries of mountains and craters , and seasonal meteorological phenomena such as clouds , dust storms and ice caps on the other planets .