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Sunday, September 21, 2025
TopicAstronomy

Topic: astronomy

Subrahmanyan Chandrasekhar’s stellar limit was called absurd. It got him 1983 Physics Nobel

No direct observations of any star exceed the Chandrasekhar limit. The theoretical physicist's calculations have helped so far to understand supernovas, neutron stars, and black holes.

Jayant Narlikar on a universe with no beginning, why sky is blue & the classic astronomy-astrology mix-up

In a 2015 'Walk the Talk' with Editor-in-Chief Shekhar Gupta, the legendary astrophysicist who died Tuesday explained his thoughts on Big Bang & how curiosity keeps a scientist young.

Amity school students witness rare planetary parade in Delhi—Saturn’s rings to Jupiter’s moons

Twenty students caught the celestial phenomenon despite fog and an AQI of 365.

Delhi is missing out on planetary parade due to pollution. Rest of India enjoys watch parties

When the planetary parade was at its best view in Kolkata, Bengaluru and Dehradun, the national capital recorded an AQI of 289. Light rain also impacted visibility in some parts of the city.

From heralding births of kings to spacecraft navigation, planetary parade’s over 2,000 yrs old history

By mid-February, Venus, Mars, Jupiter & Saturn, already visible to the naked eye, will be joined by Mercury, Neptune & Uranus in a rare 'planetary parade', officially called a syzygy.

Pune astronomers identify galaxy in Milky Way’s neighbourhood as ‘explosive factory’ of gamma rays

Kathryn’s Wheel was formed due to collision of 2 galaxies, but study published in The Astrophysical Journal Letters notes that star formation alone doesn't explain gamma ray emission.

India’s X-ray satellite system Daksha can settle the dark matter question

Daksha would be an invaluable tool to study flares from the Sun, X-rays from certain pulsating neutron stars, gamma-ray lightnings in the Earth's atmosphere, and so on.

North America prepares for total solar eclipse Monday. Wait for 2 years if you miss it

US will have clearest view, with Canada & Mexico also being able to sight phenomenon. Partial eclipse will be visible over northern parts of South America, Caribbean islands.

Indian students shine at international astronomy olympiad, win gold, silver and bronze

Aarush Mishra, Siddharth Kumar Gopal and Satwik Patnaik secured gold, silver and bronze medals, respectively, at the 2nd IOAA-Jr, an international competition of astronomy & astrophysics.

How astronomers use ‘dead stars’ to measure gravitational waves of ancient black holes

Gravitational waves are ripples in spacetime caused by massive accelerating objects.

On Camera

Skin cancer is no more an ‘old person’s disease’

The sun isn’t acting alone—it has an accomplice in pollution. Environmental toxins weaken our skin’s natural barrier.

Market regulator SEBI clears Adani Group of impropriety alleged by Hindenburg Research

SEBI probe concluded that purported loans and fund transfers were paid back in full and did not amount to deceptive market practices or unreported related party transactions.

60 yrs on, veterans recall lessons from 1965 India-Pakistan war. ‘Equipment alone doesn’t win battles’

A common thread runs through the memories of soldiers of the 1965 war—ingenuity, courage and camaraderie that withstood an apparently technologically superior foe.

India doesn’t give walkovers to Pakistan in war. Here’s why it shouldn’t do it in cricket either

Many really smart people now share the position that playing cricket with Pakistan is politically, strategically and morally wrong. It is just a poor appreciation of competitive sport.