21. What is the name of the space telescope that was launched in 2017 by the European Space Agency to study gravitational waves?
a) Hubble Space Telescope
b) Chandra X-ray Observatory
c) LISA Pathfinder
d) Laser Interferometer Gravitational-Wave Observatory (LIGO)
22. Which space telescope is used to study the sun’s corona?
a) Hubble Space Telescope
b) Chandra X-ray Observatory
c) Solar Dynamics Observatory
d) Parker Solar Probe
23. What is the name of the space telescope that was launched in 2014 by the European Space Agency to study the cosmic microwave background radiation?
a) Hubble Space Telescope
b) Chandra X-ray Observatory
c) Planck Space Telescope
d) Euclid Space Telescope
24. Which space telescope is used to study the universe at very low frequencies?
a) Hubble Space Telescope
b) Chandra X-ray Observatory
c) Spitzer Space Telescope
d) Low Frequency Array (LOFAR)
25. What is the name of the space telescope that was launched in 2018 by NASA to study the formation and evolution of stars and planets?
a) Hubble Space Telescope
b) Chandra X-ray Observatory
c) Spitzer Space Telescope
d) Transiting Exoplanet Survey Satellite (TESS)
