British Astronomy and Astrophysics Olympiad (BAAO). Click to download: British Astronomy and Astrophysics Olympiad (BAAO) Question. The XX International Astronomy Olympiad - Kazan, Tatarstan, Russia, The XI Asian-Pacific Astronomy Olympiad - Dhaka, Bangladesh, November , Missing: olimpiade ‎| ‎Must include: ‎olimpiade. Young astronomy students from 41 different countries of the world recently participated in the International Olympiad in Astronomy and Astrophysics. It was an  Missing: olimpiade ‎| ‎Must include: ‎olimpiade.


Author: Admin
Country: Estonia
Language: English
Genre: Education
Published: 13 February 2017
Pages: 449
PDF File Size: 32.28 Mb
ePub File Size: 47.86 Mb
ISBN: 986-4-31731-118-6
Downloads: 7861
Price: Free
Uploader: Admin



It housed one of the earliest large scale civilisation, the Harappan civilisation from to BC and has not looked back. It is home to some of the finest architecture in the world from Taj Mahal to olimpiade astronomy magnificent Sun Temple at Konark, which the participants to the Olympiad visited.

India is also a vibrant democracy with a lot of interest and investments in pure sciences in general and astronomy in particular. Our hosting of the 10th International Olympiad in Astronomy and Astrophysics was a part of our continuing tradition of encouraging young students to appreciate and enjoy the excitement of this oldest of pure sciences.

IOAA | International Olympiad on Astronomy and Astrophysics

Only a small portion of olimpiade astronomy stars are visual binaries. In order to see a visual binary, the stars must be separated by fairly wide distances, and the orbital periods are usually very long.

Optical Doubles are stars that appear to lie close olimpiade astronomy, but in fact do not, they only appear to us from our earthly observation to be close together. One of the stars in the pair is actually behind the first star and very far away.


The stars of an optical double olimpiade astronomy not gravitationally bound. William Herschel began looking for optical doubles in with the hope that he would find a measurable parallax, by comparing a close star to the more distant star in an optical double.

Herschel did not find any optical binaries, but he did catalog hundreds of visual binaries.

Welcome to IOAA 2016

In Herschel olimpiade astronomy so many measurements of visual binaries that he concluded that a pair of stars known as Castor were orbiting one another. This was an important discovery, because it was the first time observational evidence clearly showed two objects in orbit around each other outside of the influence of our own Sun and Solar System.

Spectroscopic Binary It is also possible to detect binary stars using a spectroscope. If two stars are orbiting each other they will both produce a spectrum.

If the stars are close to being the same brightness it is possible to see different spectral lines from both stars. These stars are of olimpiade astronomy interest because it can be used to determine the radial velocity of the orbit of the two stars.

International Olympiad on Astronomy and Astrophysics

Stars olimpiade astronomy red shifted when receding away from the earth and blue shifted as they approach. This effect is caused by olimpiade astronomy Doppler effect which distorts arriving light waves from the stars depending on the direction if their motion.

A Spectroscopic binary will alternate between blue and red shifted spectral lines. Spectroscopic binaries are not detectable if we are seeing the star head on because no Doppler shifts would be present in the spectrum. If the Doppler shifts are present in a single line of the spectrum, we are seeing the light from only one star and we call this a single-line spectroscopic binary.

If we can see the light from both stars the Doppler shifts will alternate, split and merge depending on the positions of the two stars in their orbits. This is called a double-line spectroscopic binary. One very important detail, olimpiade astronomy do not know how the orbits of the two stars are inclined to earth.

This inclination could be any angle, for that bit of information we have to go back to visual methods in order to see the individual stars to determine the inclination of their orbits relative to earth.