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SN 386, the Glossary

SN 386 is a probable transient astronomical event in the constellation Sagittarius, which appeared as a "guest star" that was reported by Chinese astronomers in 386.^[1]

Chandra X-ray Observatory

The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), is a Flagship-class space telescope launched aboard the during STS-93 by NASA on July 23, 1999.

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Dipper (Chinese constellation)

The Dipper mansion (斗宿, pinyin: Dǒu Xiù) is one of the Twenty-eight mansions of the Chinese constellations.

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Light-year

A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly 9,460,730,472,580.8 km (Scientific notation: 9.4607304725808 × 1012 km), which is approximately 5.88 trillion mi.

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Milky Way

The Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye. SN 386 and Milky Way are astronomical objects known since antiquity.

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Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc, denoted by the symbol, is a unit of angular measurement equal to of one degree.

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Neutron star

A neutron star is the collapsed core of a massive supergiant star.

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Pulsar

A pulsar (from pulsating radio source) is a highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic poles.

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Sagittarius (constellation)

Sagittarius is one of the constellations of the zodiac and is located in the Southern celestial hemisphere.

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SN 185

SN 185 was a transient astronomical event observed in 185 AD, likely a supernova. SN 386 and sN 185 are astronomical objects known since antiquity and Historical supernovae.

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SN 393

SN 393 is the modern designation for a probable supernova that was reported by the Chinese in the year 393 CE. SN 386 and sN 393 are 4th-century natural events, astronomical objects known since antiquity and Historical supernovae.

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