Question: What does a telescope collect to aid in the observation of remote objects?
About the article "Telescope", section "Abstract".

Candidate passages:
Spanning over 30 years, the evolution of the Maui Space Surveillance System has demonstrated several stages in the history of space object tracking telescopes.
Currently, through its primary mission for Air Force Space Command, the Maui Space Surveillance System combines large-aperture tracking optics with visible and infrared sensors to collect data on near Earth and deep-space objects.
The 3.67-meter telescope, known as the Advanced Electro-Optical System (AEOS), owned by the Department of Defense, is the United States' largest optical telescope designed for tracking satellites.
The 75-ton AEOS telescope points and tracks very accurately, yet is fast enough to track both low-Earth satellites and ballistic missiles.
AEOS can be used simultaneously by many groups or institutions because its light can be channeled through a series of mirrors to seven independent coudé rooms below the telescope.
Employing sophisticated sensors that include an adaptive optics system, radiometer, spectrograph, and long-wave infrared imager, the telescope tracks man-made objects in deep space and performs space object identification data collection.AEOS is equipped with an adaptive optics system, the heart of which is a 941-actuator deformable mirror that can change its shape to remove the atmosphere's distorting effects.
Scientists are expected to get near diffraction-limited images of space objects.
Other equipment at MSSS includes a 1.6-meter telescope, two 1.2-meter telescopes on a common mount, a 0.8-meter beam director/tracker, and a 0.6-meter laser beam director.
The telescopes accommodate a wide variety of sensor systems, including imaging systems, conventional and contrast mode photometers, infrared radiometers, low light level video systems, and acquisition telescopes.
In addition to these assets, the site has a machine shop, optics laboratories, and electronics laboratories.
A Remote Maui Experimental (RME) site at sea level houses additional optics and electronics laboratories.
This secondary observation station at Kihei bears IAU code 625 and is located at . 
A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).
The first known practical telescopes were invented in the Netherlands at the beginning of the 17th century, using glass lenses.
They found use in terrestrial applications and astronomy.
Within a few decades, the reflecting telescope was invented, which used mirrors.
In the 20th century many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s.
The word "telescope" now refers to a wide range of instruments detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors.
The word ""telescope"" (from the Greek τῆλε, "tele" "far" and σκοπεῖν, "skopein" "to look or see"; τηλεσκόπος, "teleskopos" "far-seeing") was coined in 1611 by the Greek mathematician Giovanni Demisiani for one of Galileo Galilei's instruments presented at a banquet at the Accademia dei Lincei.
In the "Starry Messenger", Galileo had used the term "perspicillum".
The Faulkes Telescope North, part of the Faulkes Telescope Project, is a reflecting telescope owned and operated by the Las Cumbres Observatory Global Telescope Network.
It provides remote access to a research-quality telescope primarily to students in the United Kingdom. 
The majority of IRTF users prefer to use IRTF remotely.
Observers can use IRTF from any location with a high speed internet connection, such as their office or home, anywhere around the world.
The observer controls the instrument via a VNC session, just as they would at the summit, and communicates with the telescope operator via phone, Polycom, or Skype.
The observer calls in and logs in for their time allocation.
Remote observing has several advantages.
Remote observing spares the observer from the time and cost of traveling from their home institution to Hawaii.
In the past, when observers traveled to the telescope, the telescope was scheduled in full nights.
With remote observing, observers only need to submit a request for the amount of time they need, when they need it, instead of asking for whole nights.
Since the observers do not travel to Hawaii, they can also request to use the telescope more frequently.
This has enabled the IRTF to support many programs where frequent observations of targets are necessary, such as weekly monitoring of solar system objects.
Remote observing has also allowed the IRTF to support target of opportunity (ToO) programs.
These are programs of high scientific merit but where the timing of the observation cannot be predicted at the time that telescope is scheduled.
Examples include supernovae, which explode unexpectedly, or near-earth asteroids that may be discovered shortly before their closest approach to the Earth.
Although the observers are usually remote, the telescope operator is at the summit to ensure the safety of the facility, assist the observer, and trouble shoot problems that may arise during the night. 
An X-ray telescope (XRT) is a telescope that is designed to observe remote objects in the X-ray spectrum.
In order to get above the Earth's atmosphere, which is opaque to X-rays, X-ray telescopes must be mounted on high altitude rockets or artificial satellites.