The first detection of gravitational waves in 2015 was a landmark event. It was like being hit by a ripple in an ocean. But the source of the wave remained tentative. The recent simultaneous detection of a gravitational wave and its electromagnetic counterpart in different wavebands has, however, ushered in a new era. We have not only detected the ripple in ocean but also seen flashes of fireworks from the phenomenon that triggered the ripples. The promise of pursuing astronomical studies with the help of gravitational waves is not a pipe dream any longer.
One very rewarding measurement using a projection box and a small telescope is that of the angular diameter of the Sun, which can be done on any day. Once one gets used to the nitty-gritties of this measurement, one can also pursue measurements related to the presence and the movement of the planet Mercury on… Read more POSSIBLE MEASUREMENTS WITH SIMPLE PROJECTION OF THE SUN
Astronomy is unique among all fields of science in that it brings together laypersons, amateur astronomers and professionals like no other subject does. If it ever behooved a professional body of scientists to engage with people at large, the first choice would naturally be that of astronomers. While other professional societies reach out to people… Read more From the Editor’s Desk
The Public Outreach and education Committee (POEC) of the Astronomical Society of India (ASI), since its constitution three years back, has been making dedicated efforts in taking Astronomy to the general public, for example, by a variety of activities carried out during annual meetings of ASI. The enthusiastic response received from the general public, specially,… Read more A Message from the ASI President
ne very rewarding measurement using a projection box and a small telescope is that of the angular diameter of the Sun, which can be done on any day. Other experiments that can be done with the same set-up are to do with sunspots, and measuring the angular size of the Moon during solar eclipses.
As this trimester begins, Jupiter and Saturn, two planets currently visible in the evening sky, and Venus, which is visible in the morning sky, are getting closer to the Sun. Jupiter is in conjunction with the Sun on 26th of October. A conjunction between two celestial bodies is when they appear very close to each… Read more Some Interesting Astronomical Events for the Naked Eye During Oct – Dec 2017
Solar eclipses give us a space to view the spectacular corona, which is the extended atmosphere of the Sun. While the overall view of the corona can be spell binding, its detailed structure can tell astronomers much more about the Sun and its magnetic field. The coronal gas can act as a tracer of the… Read more Corona During the Recent Total Solar Eclipse — Prediction Comes Out Right
More than a hundred years ago, it was believed that the universe was an infinite collection of stars distributed more or less uniformly in space. Since the discovery of galaxies as ‘islands of stars’ by Edwin Hubble, astronomers have discovered that there is a hierarchy of structures in the Universe. Galaxies cluster around themselves and… Read more A New Supercluster
The POEC organised a host of outreach and education activities in the valley of Kashmir for two weeks during the national ASI meeting hosted by the University of Kashmir in Srinagar in May 2016. This was a highly successful program, carried out in collaboration with a number of local stakeholders, and inspired similar Comprehensive Regional… Read more “Astronomy in the Valley” : A Report on our Work in Kashmir
Zero Shadow Day (ZSD) occurs twice a year for every place between +23.5 and -23.5 latitude, when the declination of the Sun equals the latitude of the place. At this time, the Sun is directly overhead and hence a vertical pole will cast no shadow. The ZSD occurs for a large part of India, and… Read more The Zero Shadow Day Campaign