Facts
US-ELTP
![One System](https://noirlab.edu/public/media/img/USELTP-icons/US-ELTP/2-telescopes-1-system.png)
2 telescopes
One System
![Sharper than the largest space telescope](https://noirlab.edu/public/media/img/USELTP-icons/US-ELTP/4x-sharper.png)
4x
Sharper than the largest space telescope
Up to 200x
More sensitive than today’s largest telescopes
![Key science themes](https://noirlab.edu/public/media/img/USELTP-icons/US-ELTP/key-science-cases.png)
4
Key science themes
![Annual amount of data collected in US-ELTP science archive](https://noirlab.edu/public/media/img/USELTP-icons/NOIRLab/5-petabytes.png)
5 petabytes/yr
Annual amount of data collected in US-ELTP science archive
Giant Magellan Telescope
![Type of telescope design](https://noirlab.edu/public/media/img/USELTP-icons/GMT/gregorian-design.png)
Gregorian
Type of telescope design
![Diameter of primary light-collecting surface](https://noirlab.edu/public/media/img/USELTP-icons/GMT/25.4meters.png)
25.4 meters
Diameter of primary light-collecting surface
![Number of round primary mirror segments](https://noirlab.edu/public/media/img/USELTP-icons/GMT/7-Segments.png)
7
Number of round primary mirror segments
![Diameter of each primary mirror segment](https://noirlab.edu/public/media/img/USELTP-icons/GMT/8.4meters-each.png)
8.4 meters
Diameter of each primary mirror segment
![Light-collecting area](https://noirlab.edu/public/media/img/USELTP-icons/GMT/light-collecting-area.png)
368 square meters
Light-collecting area
![Wavelength range from near-ultraviolet to mid-infrared](https://noirlab.edu/public/media/img/USELTP-icons/GMT/wavelength-range.png)
320–25,000 nanometers
Wavelength range from near-ultraviolet to mid-infrared
![Diameter of the field of view](https://noirlab.edu/public/media/img/USELTP-icons/GMT/1-3degree-fov.png)
⅓-degree
Diameter of the field of view
![Height of enclosure](https://noirlab.edu/public/media/img/USELTP-icons/GMT/65-meters-high.png)
65 meters
Height of enclosure
![Weight of telescope](https://noirlab.edu/public/media/img/USELTP-icons/GMT/weight.png)
2100 tons
Weight of telescope
![Altitude of site at Las Campanas Observatory in Chile](https://noirlab.edu/public/media/img/USELTP-icons/GMT/GMT-elevation.png)
2514 meters
Altitude of site at Las Campanas Observatory in Chile
![Number of first-generation instruments](https://noirlab.edu/public/media/img/USELTP-icons/GMT/first-light-instruments.png)
4
Number of first-generation instruments
Thirty Meter Telescope
![Type of telescope design](https://noirlab.edu/public/media/img/USELTP-icons/TMT/Ritchey-Chretien-design.png)
Ritchey-Chrétien
Type of telescope design
![Diameter of primary light-collecting surface](https://noirlab.edu/public/media/img/USELTP-icons/TMT/30-meters.png)
30 meters
Diameter of primary light-collecting surface
![Number of hexagonal primary mirror segments](https://noirlab.edu/public/media/img/USELTP-icons/TMT/492-segments.png)
492
Number of hexagonal primary mirror segments
![Diameter (long diagonal) of each primary mirror segment](https://noirlab.edu/public/media/img/USELTP-icons/TMT/1.44m-each.png)
1.44 meters
Diameter (long diagonal) of each primary mirror segment
![Light-collecting area](https://noirlab.edu/public/media/img/USELTP-icons/TMT/light-collecting-area.png)
655 square meters
Light-collecting area
![Wavelength range from near-ultraviolet to mid-infrared](https://noirlab.edu/public/media/img/USELTP-icons/TMT/wavelength-range.png)
310–30,000 nanometers
Wavelength range from near-ultraviolet to mid-infrared
![Diameter of the field of view](https://noirlab.edu/public/media/img/USELTP-icons/TMT/1-3degree-fov.png)
⅓-degree
Diameter of the field of view
![Height of enclosure](https://noirlab.edu/public/media/img/USELTP-icons/TMT/56-meters-high.png)
56 meters
Height of enclosure
![Weight of telescope](https://noirlab.edu/public/media/img/USELTP-icons/TMT/weight.png)
2650 tons
Weight of telescope
![Altitude of preferred site on Maunakea in Hawaiʻi](https://noirlab.edu/public/media/img/USELTP-icons/TMT/elevation.png)
4012 meters
Altitude of preferred site on Maunakea in Hawaiʻi
![Number of first-generation instruments](https://noirlab.edu/public/media/img/USELTP-icons/TMT/first-light-instruments.png)
3
Number of first-generation instruments
NOIRLab
![Observatory summits](https://noirlab.edu/public/media/img/USELTP-icons/NOIRLab/4-summits.png)
4
Observatory summits
![Scientists from all over the world may apply for observing time](https://noirlab.edu/public/media/img/USELTP-icons/NOIRLab/open-skies.png)
Open Skies
Scientists from all over the world may apply for observing time
![Proposals for telescope time processed per year (10x more expected for the US-ELTP)](https://noirlab.edu/public/media/img/USELTP-icons/NOIRLab/set-of-tools.png)
1000
Proposals for telescope time processed per year (10x more expected for the US-ELTP)
![User support experience at national observatories](https://noirlab.edu/public/media/img/USELTP-icons/NOIRLab/5-decades.png)