10 June - Explorer 49 -Radio Astronomy Explorer - USA - NASA

NASA's Explorer 49 (also called Radio Astronomy Explorer-B(RAE-B)) was a 328-kilogram (723 lb) satellite launched on June 10, 1973 for long wave radio astronomy research. It had four 230-metre-long (750 ft) X-shaped antenna elements, which made it one of the largest spacecraft ever built.

Explorer 49 was launched after the termination of the Apollo program, and although it did not examine the Moon directly, it became the last American lunar orbital mission until the launch of Clementine spacecraft in 1994. It was launched on June 10, 1973, 14:13:00 UTC in the Rocket Delta 1913 from the Launch site Cape Canaveral LC-17B.

This mission was the second of a pair of Radio Astronomy Explorer (RAE) satellites, Explorer 38 or RAE-A being the first. Explorer 49 was placed into lunar orbit to provide radio astronomical measurements of the planets, the Sun, and the galaxy over the frequency range of 25 kHz to 13.1 MHz. Since the spacecraft's design used gravity gradient booms, the lumpy lunar gravity field was a problem for the mission scientists.

10 June - Bhai Vir Singh death anniversary

 

Bhai Vir Singh ( 05 December 1872 - 10 June, 1957) was a poet, scholar and theologian who was a major figure in the movement for the revival and renewal of Punjabi literary tradition.

His identification with all the important concerns of modern Sikhism was so complete that he came to be canonized as Bhai, the Brother of the Sikh Order, very early in his career. For his pioneering work in its several different genres, he is acknowledged as the creator of modern Punjabi literature.

Born on 05 December 1872, in Amritsar, Bhai Vir Singh was the eldest of Dr Charan Singh's three sons. The family traces its ancestry back to Diwan Kaura Mall Arora (d. 1752), who rose to the position of vice-governor of Multan, under Nawab Mir Mu'ln ul-Mulk, With the title of Maharaja Bahadur. Bhai Vir Singh was married at the age of 17 to Chatar Kaur, daughter of Sardar Narain Singh of Amritsar.

The Government of India released a stamp to commemorate Bhai sahib's birth centenary in 1972.

10 June - Prakash Padukone birthday

Prakash Padukone (born 10 June 1955) is a former Indian badminton player. He was ranked World No. 1 in 1980; the same year he became the first Indian to win the All England Open Badminton Championships. He was awarded the Arjuna award in 1972 and the Padma Shri in 1982 by the Government of India.He is one of the co-founders of Olympic Gold Quest, a foundation dedicated to the promotion of Olympic sports in India.

Padukone was born on 10 June 1955 in Padukone village near Kundapura, Udupi. His father, Ramesh, was a secretary of the Mysore Badminton Association.

Padukone married Ujjala, as arranged by their parents in the Indian Hindu system.He has two daughters, Deepika and Anisha.