April 10

Dayananda Saraswati established the Arya Samaj, a Vedic reform movement centered on the authority of the Vedas, at its first meeting in Bombay.

Vittal Rao, later the saint Swami Ramdas of Anandashram, was born in Hosdurg, Kerala; his life of Ram-nama devotion is recorded in 'In Quest of God.'

Rakhal Chandra Ghosh, a direct disciple of Ramakrishna and first president of the Ramakrishna Math and Mission, died in Kolkata.

The Event Horizon Telescope collaboration released the first direct image of a black hole, at the center of the galaxy M87, assembled from a worldwide network of radio observatories.