किस प्राचीन भारतीय खगोलशास्त्री ने पश्चिमी वैज्ञानिकों से सदियों पहले यह विचार दिया था कि पृथ्वी सूर्य के चक्कर लगाती है?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?