Can you solve this question from the Russian astronomy olympiad :
In an otherwise empty universe, two rocks of 5 kg each orbit each other at
a distance of 1 m. What is the orbital period?
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Cosmic Fact: A rogue planet (free-floating planet) drifts through space without being gravitationally bound to any star. 🪐✨
@AstronomyOCL
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Google Docs
Registration Form Polaris's Session
🚀 Live Career Session with an ISRO Scientist – Mr. Ankit Gupta
Ever wondered what it really takes to work at ISRO?
Join us for an interactive career session with Mr. Ankit Gupta, ISRO Scientist, where you'll get an inside look at life in India's space program.…
Ever wondered what it really takes to work at ISRO?
Join us for an interactive career session with Mr. Ankit Gupta, ISRO Scientist, where you'll get an inside look at life in India's space program.…
🚀 Project Polaris – Registrations Are Now Open! 🌌
Project Polaris is organizing an exclusive LIVE Interactive Session with Mr. Ankit Gupta (ISRO Scientist). ✨️
🔹️ Learn about careers at ISRO
🔹️ Understand the ISRO recruitment process & internship opportunities
🔹️ Hear about Mr. Gupta's inspiring journey and insights into the future of India's space programme
🔹️ Participate in a live AMA (Ask Me Anything) session and ask your questions directly
🏆 Special Bonus: The participant with the best interaction during the session will receive an exclusive 1:1 conversation with Mr. Ankit Gupta.
📅 Register now and don't miss this incredible opportunity!
🔗 Registration Form: Click Here
@AstronomyOCL
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A space probe is launched from Earth into a Hohmann transfer orbit to study an asteroid. The asteroid moves in a circular orbit around the Sun at a distance of 4 AU. Assuming Earth's orbit is also circular with a radius of 1 AU, calculate the time (in years) required for the probe to travel from Earth to the asteroid. (NSEA inspired)
(A) 1.25 years
(B) 1.98 years
(C) 2.5 years
(D) 3.95 years
(A) 1.25 years
(B) 1.98 years
(C) 2.5 years
(D) 3.95 years
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The right ascension and declination of a star are RA = 06 h 00 m and Dec = -30°. On a particular day, the star culminates at the local meridian at 20:00 hours local time. What will be its approximate right ascension when it culminates at 22:00 hours local time a month later? (NSEA-2019)
(a) 4 h, 00 m
(b) 6 h, 00 m
(c) 8 h, 00 m
(d) 12 h, 00 m
(a) 4 h, 00 m
(b) 6 h, 00 m
(c) 8 h, 00 m
(d) 12 h, 00 m
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🌐 Global Astronomy & Astrophysics Challenge (GAAC) 2026 ✨
🚀 Registrations are now OPEN!
🔹️ An international team-based Astronomy & Astrophysics competition organized by STEM Astronomy Club.
🔹️ Registration Deadline: 30 August 2026
🔹️ Round 1 (Individual Qualification): 5 September
🔹️ Round 2 (Team Challenge): 10 September
🔹️ Results & Certificates: 15 September
Official Website: Click Here 👈
GAAC Telegram Channel: Click Here 👈
Registration Link: Click Here 👈
@AstronomyOCL
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A planet orbits the Sun at a distance of 4.0 AU from the Sun. The orbital speed v₀ and the time period T of the planet are approximately: (Section-2, NSEA 2023)
(A) v₀ = 7.92 km/s
(B) v₀ = 14.93 km/s
(C) T = 4 years
(D) T = 8 years
(A) v₀ = 7.92 km/s
(B) v₀ = 14.93 km/s
(C) T = 4 years
(D) T = 8 years
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www.spaceappschallenge.org
Space Apps Challenge
The NASA International Space Apps Challenge is a hackathon for coders, scientists, designers, storytellers, makers, builders, technologists, and innovators around the world to come together and use open data from NASA and its Space Agency Partners to create…
🌐 NASA Space Apps Challenge 2026 – Registrations OPEN! ✨
🔹️ 📅 Event: 14–15 November 2026
🔹️ 🌐 Mode: Virtual & In-Person
🔹️ 🌍 Eligibility: Open to participants worldwide.
🔹️ 💡 Challenge: Build innovative solutions for Earth & Space using NASA's open data.
Official Website: Click Here
@AstronomyOCL
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The Astronomy League - [OCL] - [NSEA, INAO, IOAA, USAAAO]
🌐 Global Astronomy & Astrophysics Challenge (GAAC) 2026 ✨ 🚀 Registrations are now OPEN! 🔹️ An international team-based Astronomy & Astrophysics competition organized by STEM Astronomy Club. 🔹️ Registration Deadline: 30 August 2026 🔹️ Round 1 (Individual Qualification):…
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aoac.aoguide.app
AOAC | AO Guide Astrophysics Challenge
The hardest, most fun astrophysics competition on the planet.
🚀 AO Guide Astrophysics Challenge (AOAC) 2026 – Pre-Registrations Now Open! ✨️
🔹 The AO Guide Astrophysics Challenge (AOAC) is the rebranded successor to the Online Astronomy Competition (OAC), bringing an even bigger and better international astrophysics challenge.
✨ Who can participate?
🔹️ High school students & first-year undergraduates
🔹️ Completely FREE and held fully online
🏆 Problems are curated by past IOAA medalists & participants, with cash prizes, exciting prizes, and prestigious titles for top performers.
🌍 Last edition (OAC): 340+ participants from 44+ countries.
🔗 Registration Link: Click Here
💬 Official Discord Server: Click Here
@AstronomyOCL
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Which of Jupiter's Galilean moons has the largest volume? CNAO - 2018
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