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Sputnik 2 was the second spacecraft launched into Earth orbitEarth orbit is an orbit around the planet Earth. The Moon, Earth's only natural satellite, is in Earth orbit. Artificial satellites are launched into Earth orbit, and spacecraft bound for other locations in the solar system usually begin their missions by, at 19:12:00 on November 3, 1957, and was the first spacecraftA spacecraft is a vehicle that travels through space. Spacecraft include robotic or unmanned space probes as well as manned vehicles. The term is sometimes also used to describe artificial satellites, which have similar design criteria. The term spaceship to carry biological material. It was a 4 meter high cone-shaped capsule with a base diameter of 2 meters. It contained several compartments for radio transmitters, a telemetryTelemetry is a technology which allows the remote measurement and reporting of information of interest to the system designer or operator. The word is derived from Greek roots tele remote, and metron to measure. Telemetry typically refers to wireless comm system, a programming unit, a regeneration and temperature control system for the cabin, and scientific instruments. A separate sealed cabin contained the experimental dog LaikaLaika is also the name of several breeds of dogs. Laika ( Cyrillic: "Barker") was one of the Russian space dogs and the first living passenger to enter orbit on Sputnik 2, a Soviet spacecraft. Some classify her as the first animal to enter space, although.

Engineering and biological data were transmitted using the Tral_D telemetry system, which would transmit data to Earth for 15 minutes of each orbit. Two spectrophotometers were on board for measuring solar radiation ( ultravioletNote: Ultraviolet is also the name of a 1998 UK television miniseries about vampires. Ultraviolet UV radiation is electromagnetic radiation of a wavelength shorter than that of visible light, but longer than that of soft X-rays. It can be subdivided into and x-rayIn the NATO phonetic alphabet, X-ray represents the letter X. Rontgen An X-ray is a form of electromagnetic radiation with a wavelength approximately in the range of 5 pm to 10 nanometers (corresponding to frequencies in the range 30 PHz to 60 EHz). X-ray emissions) and cosmic rays. A television camera was mounted in the passenger compartment to observe Laika. The camera could transmit 100-line video frames at 10 frames/second.