Telescopic

adjective

1. Pertaining to, or carried out by means of, a telescope.
2. Seen by means of a telescope; only visible through a telescope.

   "telescopic stars"

3. Capable of seeing distant objects; far-seeing.
4. Able to be extended or retracted by the use of parts that slide over one another.
5. Referring to parts being extended or retracted along coinciding axes (with or without direct contact between the parts).