Terrestrial-based telescopes

Initiated by the Solar-Terrestrial Environment Laboratory of the Nagoya University in Japan, a new global network of solar neutron telescopes was set up. Seven locations well distributed in longitude enable the observation of solar neutrons during 24 hours a day. The detectors are capable to determine the incident neutrons energies and directions. Observations based on this network are reported e.g. by Sako et al., 2003. 

The National Aeronautics and Space Administration (NASA) and several other space agencies have studied the feasibility of space-based radio telescopes. Several radio astronomy satellites have been launched into Earth orbit, where interference from terrestrial interference is much less. These instruments have been quite successful, and even more capable radio astronomy satellites are likely to be launched throughout the twenty-first century. Furthermore, several feasibility studies have been done on the prospect of building a radio astronomy observatory on the far side of the Moon, where the radio telescopes would be completely shielded from terrestrial interference. As yet, there are no plans for such a facility, but it is likely to eventually be built, probably at some point within the century. Naturally, such developments will bring new challenges and new opportunities to the field of radio astronomy. 

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