| With reference to 'Astrosat', the astronomical observatory launched by India, which of the following statements is/are correct? |
| 1. Other than USA and Russia, India is the only country to have launched a similar observatory into space. |
| 2. Astrosat is a 2000 kg satellite placed in an orbit at 1650 km above the surface of the Earth. |
| Select the correct answer using the codes given below |
A) Only 1
B) Only 2
C) Both 1 and 2
D) Neither1nor 2
Correct Answer: D
Solution :
Exp. [d] Astrosat is India's first dedicated multi-wavelength space observatory. It was launched on a PSLV-XL on 28th September, 2015. Astrosat, multi-wavelength astronomy mission on an IRS-class satellite into a near-Earth, equatorial orbit. The five instruments on board cover the visible (320-530 nm), near UV (180-300 nm), far UV (130-180 nm), soft X-ray (0.3-8 ke V and 2-10ke V) and hard X-ray (3-80ke V and 10-150ke V) regions of the electromagnetic spectrum. Astrosat performs multi-wavelength observations covering spectral bands from radio, optical, IR, UV, and X-ray wavelengths. While radio, optical and IR observations would be coordinated through ground-based telescopes, the high energy regions, i.e. UV, X-ray and visible wavelength, would be covered by the dedicated satellite-borne instrumentation of Astrosat. The 1,513 kg-weighing riihnirl-shanad satellite would he avsntiiallv fins-tunari into 650 The satellite can perform simultaneous multi-wavelength observations of various astronomical objects. The Sun and star sensors, besides the gyroscopes, would provide orientation reference to the satellite, which has a mission life of five years. Astrosat aims at understanding the high energy processes in binary star systems containing neutron stars and black holes, to estimate magnetic fields of neutron stars, to study star birth regions and high energy processes in star systems lying beyond the Milky Way Galaxy.
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