Two large objective lenses.
A mirror instead of and objective lens (:
One who, or that which, reflects., Something having a polished surface for reflecting light or heat, as a mirror, a speculum, etc., A reflecting telescope., A device for reflecting sound.
Optical telescopes are placed high to avoid having to look through the thickest part of the atmosphere. Radio telescopes are place in valleys to avoid the effects of man-made electrical noise in the telescope.
A poem about having trouble sleeping
Telescopes in space are able to view objects clearly without having to look through a thick layer of the Earth's atmosphere. This enables them to capture better pictures and observe dimmer and more distant objects.
Shrimps and crabs differ from molluscs by having a chitinous exoskeleton and jointed appendages.
When you are having a polite disagreement with someone.
All telescopes collect or focus radiation in some way, because visible light is a form of electromagnetic radiation. The advantages of telescopes include being able to see things that are far away, as well as the ability to observe heavenly bodies.
Most telescopes in the desert are quite a distance from towns and cities which means that scientists and technicians must travel to reach them or to obtain supplies.
Atoms of the same element may differ from one another by having differing numbers of Neutrons in their centres.
This is because they are easier to mantain as it does not require launches to get astronaughts up there to fix them. Also they are cheaper having to make a telescope usable in space takes time and money, it also requires a launch which is expensive as well. It is easier to view the results as you can view them directly form the telescopes, instead of them having to be sent from space down to earth using microwaves then you need an antana and other equipment to view it.
Lampreys differ from hagfishes by having a notochord that is surrounded by a tube of cartilage.