Caroline Herschel did not use a telescope in space. She was an astronomer who lived from 1750 to 1848, long before humans could travel to space. She used telescopes on Earth, notably a large reflecting telescope built by her brother, William Herschel.

It's important to remember that space travel and space telescopes are relatively recent developments. While Caroline Herschel was a pioneering astronomer, her work was entirely ground-based.