Mariner 9 enters orbit around Mars

The recorded burst had no precise sky position at detection; its meaning became clear only with later analysis.

Armstrong and Aldrin landed in the Sea of Tranquility while Collins remained in lunar orbit.

The landing prepared for direct observations and sample collection by human explorers on the Moon.

Michael Collins piloted the command module while the lunar module descended to the surface.

The landing was a milestone in human exploration of the solar system; the first steps took place later in UTC on 21 July.

Engine firing slowed Mariner 9 enough for capture by Martian gravity.

The new orbit enabled prolonged planetary study, although a global dust storm initially limited surface views.

Mariner 9 showed how staying in orbit could reveal much more than a single passing encounter.

Designed and built in India, the country’s first satellite was launched on a Soviet rocket.

Aryabhata began a new phase in India’s scientific and engineering space work.