Apr 27

Gamma Ray Burst in Leo
Gamma Ray Burst in Leo

2013 – At 3:47 a.m. EDT Fermi’s Gamma-ray Burst Monitor (GBM) triggered on an eruption of high-energy light in the constellation Leo, with an energy of at least 94 billion electron volts (GeV), or some 35 billion times the energy of visible light, and about three times greater than the previous record.

2012 – Expedition 30 lands safely in Kazakhstan. Commander Dan Burbank, Soyuz Commander Anton Shkaplerov and Anatoly Ivanishin completed almost six months in space.

Expedition 30 returns to Earth

1999Asteroid 1989 ML Near-Earth Flyby (0.2520 AU)

1989Soyuz TM-7 lands ending a long duration mission to MIR.

Polyakov, Volkov, Krikalev Return to Earth
Polyakov, Volkov, Krikalev Return to Earth

1972Apollo 16 landing in the Pacific Ocean. Recovery Ship: USS Ticonderoga. Mission Duration: 11 days, one hour, 51 minutes. Lunar Surface Time: 71:02:13, Distance: 1,391,550 miles
Lunar Location: Descartes Highlands, Lunar Coordinates: 8.97 degrees south, 15.51 degrees east.

Apollo 16 returns to Earth
Juno 11 rocket launches the Explorer 11 gamma-ray observatory.
Juno 11 rocket launches the Explorer 11 gamma-ray observatory.

1961 – Juno II launches Explorer11 to discover a cosmos of gamma rays from sources nearby like the Sun, and far away, like the galactic center. During the spacecraft’s seven-month lifespan it detected twenty-two events from gamma-rays and approximately 22,000 events from cosmic radiation. (wiki)

Birthdays

1953Ellen Louise Shulman Baker an American physician mission specialist astronaut 3 spaceflights, 28.6 days in space. Flew to orbit on STS-34 (1989), STS-50, STS-71.

1942Valeri Polyakov was a Russian doctor and cosmonaut. (d. 7 September 2022) He is the record holder for the longest single stay in space, staying aboard the Mir space station for more than 14 months (437 days, 18 hours) during one trip.Up aboard Soyuz TM-18 and down Soyuz TM-20.