The rigidity difference between the lithosphere and the asthenosphere exists becausedownward through the asthenosphere, the weakening effect of increasing temperature exceeds thestrengthening effect of increasing pressure. This is so to a depth of about 210 km.
Arecibo Observatory This gigantic radio telescope has contributed to scientific discoveries since the 1960s, and has appeared in many movies and television shows. The Arecibo Observatory is the worldâs largest radio telescope and one of Puerto Ricoâs most well-known attractions. It has featured in many Hollywood blockbusters, including the James Bond movie GoldenEye and Contact, starring Jodie Foster. During the past 50 years, the Arecibo Observatory has played a crucial role for researchers in the fields of radio astronomy, radar astronomy and aeronomy.
The Vainu Bappu Observatory is owned and operated by Indian Institute of Astrophysics. It is located in the Javadi Hills Kavalur, near vaniyambadi of vellore district in the Iâ¦ndian state of Tamil Nadu, 175 km south-east of Bangalore. The observatory is home to the Vainu Bappu Telescope, the largest telescope in Asia. It has a diameter of 2.3 meters and was first used in 1986.