# Bion (satellite)

The Bion satellites (Russian: Бион), also named Biocosmos, is a series of Soviet (later Russian) biosatellites focused on space medicine.

## Bion space program
### Bion precursor flights and Bion flights

The Soviet biosatellite program began in 1966 with Kosmos 110, and resumed in 1973 with Kosmos 605. Cooperation in space ventures between the Soviet Union and the United States was initiated in 1971, with the signing of the United States and Soviet Union in Science and Applications Agreement (which included an agreement on space research cooperation). The Soviet Union first offered to fly U.S. experiments on a Kosmos biosatellite in 1974, only a few years after the termination (in 1969) of the U.S. biosatellite program. The offer was realized in 1975 when the first joint U.S./Soviet research were carried out on the Kosmos 782 mission.
The Bion spacecraft were based on the Zenit spacecraft and launches began in 1973 with primary emphasis on the problems of radiation effects on human beings. Launches in the program included Kosmos 110, 605, 690, 782, plus Nauka modules flown on Zenit-2M reconnaissance satellites. 90 kg (200 lb) of equipment could be contained in the external Nauka module.
The Soviet/Russian Bion program provided U.S. investigators a platform for launching Fundamental Space Biology and biomedical experiments into space. The Bion program, which began in 1966, included a series of missions that flew biological experiments using primates, rodents, insects, cells, and plants on a biosatellite in near Earth orbit. NASA became involved in the program in 1975 and participated in 9 of the 11 Bion missions. NASA ended its participation in the program with the Bion No.11 mission launched in December 1996. The collaboration resulted in the flight of more than 100 U.S. experiments, one-half of all U.S. life sciences flight experiments accomplished with non-human subjects.
The missions ranged from five days (Bion 6) (Kosmos 1514) to around 22 days (Bion 1 and Kosmos 110).

### Bion-M

In 2005, the Bion program was resumed with three new satellites of the modified Bion-M type – the first flight was launched on 19 April 2013 from Baikonur Cosmodrome, Kazakhstan. The first satellite of the new series Bion-M1 featured an aquarium by the German Aerospace Center (DLR) and carried 45 mice, 18 Mongolian gerbils, 15 geckos, snails, fish and micro-organisms into orbit for 30 days before re-entry and recovery. All the gerbils died due to a hardware failure, but condition of the rest of the experiments, including all geckos, was satisfactory. Half the mice died as was predicted.
Bion-M2 is scheduled to launch no earlier than March 2025 on a Soyuz 2.1a rocket to an altitude of 800 km. The orbiter will carry 75 mice and studies will focus on how they are affected at the molecular level by space radiation.

## Launch history

Bion (satellite) :
| Bion program | Bion no. | Kosmos no. | Launch Date (UTC) | Rocket | Launch Site |
| Precursor flight | — | Kosmos 110 | 22 February 1966, 20:09:36 | Voskhod | Baikonur, Site 31/6 |
| Bion flights | Bion 1 | Kosmos 605 | 31 October 1973, 18:24:59 | Soyuz-U | Plesetsk, Site 43/3 |
| Bion flights | Bion 2 | Kosmos 690 | 22 October 1974, 17:59:59 | Soyuz-U | Plesetsk, Site 43/4 |
| Bion flights | Bion 3 | Kosmos 782 | 25 November 1975, 17:00:00 | Soyuz-U | Plesetsk, Site 43/3 |
| Bion flights | Bion 4 | Kosmos 936 | 3 August 1977, 14:00:00 | Soyuz-U | Plesetsk, Site 43/3 |
| Bion flights | Bion 5 | Kosmos 1129 | 25 September 1979, 15:30:00 | Soyuz-U | Plesetsk, Site 41/1 |
| Bion flights | Bion 6 | Kosmos 1514 | 14 December 1983, 07:00:00 | Soyuz-U | Plesetsk, Site 41/1 |
| Bion flights | Bion 7 | Kosmos 1667 | 10 July 1985, 03:15:00 | Soyuz-U | Plesetsk, Site 41/1 |
| Bion flights | Bion 8 | Kosmos 1887 | 29 September 1987, 12:50:00 | Soyuz-U | Plesetsk, Site 41/1 |
| Bion flights | Bion 9 | Kosmos 2044 | 15 September 1989, 06:30:00 | Soyuz-U | Plesetsk, Site 41/1 |
| Bion flights | Bion 10 | Kosmos 2229 | 29 December 1992, 13:30:00 | Soyuz-U | Plesetsk, Site 43/3 |
| Bion flights | Bion 11 | — | 24 December 1996, 13:50:00 | Soyuz-U | Plesetsk, Site 43/4 |
| Bion-M flights | Bion-M No.1 | — | 19 April 2013, 10:00:00 | Soyuz 2.1a | Baikonur, Site 31/6 |
| Bion-M flights | Bion-M No.2 | | March 2025 | Soyuz 2.1b | Baikonur, Site 31/6 |
| Bion-M flights | Bion-M No.3 | | 2027 | | |