  Astronomy and Astrophysics is an observational science dealing with celestial
objects. Aryabhatta Research Institute of Observational Sciences (ARIES) is one
of the premier institutions in astronomy and astrophysics and has contributed
significantly in this field. No doubt, India is a part of several mega-science
projects in the domain of Astronomy and Astrophysics, such as the Thirty Meter
Telescope (TMT); Square Kilometer Array (SKA) and Laser Interferometer
Gravitational-wave Observatory (LIGO) projects. Growing engagement of India
with mega-science projects has brought a positive impact on its science and
technology landscape. A few such collaborations are mentioned to demonstrate
that international cooperation are necessary in the field of Astrophysical
sciences.
