Kosmos 7 (Russian: Космос 7 meaning Cosmos 7), also known as Zenit-2 #4 and occasionally in the West as Sputnik 17 was a Sovietreconnaissance satellite launched in 1962. It was the seventh satellite to be designated under the Kosmos system, and the second successful launch of a Soviet reconnaissance satellite. It also marked the first successful launch of a Vostok-2, on the second attempt. The first Vostok-2 launch, also carrying a Zenit-2 satellite, suffered an engine failure seconds after launch, fell back to earth and exploded within 300 metres of the launch pad.
Kosmos 7 was a Zenit-2 satellite, a reconnaissance satellite derived from the Vostok spacecraft used for manned flights. It was the second Zenit-2 to reach orbit, the first being Kosmos 4. The next Zenit-2 launch was Kosmos 9. Kosmos 7 carried an area survey reconnaissance payload. In addition to reconnaissance, it was also used for research into radiation.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.