Vega was a planet mentioned a number of times in Foundation by Isaac Asimov. It was capital of the Vega Province in the Galactic Empire, one of the wealthiest provinces in the entire Galaxy. Until the revolt of the Anacreon Prefect, it traded with Terminus, capital of the Foundation. One of the known quantities it exported was tobacco, of notably high quality.
At this altitude, pressure and temperature conditions of Venus are similar to those of Earth, though the planet's winds moved at hurricane velocity and the carbon dioxide atmosphere is laced with sulfuric acid, along with smaller concentrations of hydrochloric and hydrofluoric acid.
Vega 1 made its closest approach on March 6, around 8,890 km from the nucleus, and Vega 2 made its closest approach on March 9 at 8,030 km.
Vega 2 flew in closer to the comet nucleus at a distance of 8,030 km on March 9, 1986.
In 1983, based on observations by the Infrared Astronomy Satellite (IRAS), Vega became one of the first stars to be discovered with a large luminous infrared-radiating halo that suggests a circumstellar cloud of warm dust.
Since Vega seems to be rotating with its pole directed toward Earth, the dust cloud probably represents a face-on disk that may not be unlike the disk surrounding the Sun and that contains the planets.
Instead, calculations show that an eccentric planet traps dust in two main concentrations at different distances from the star, at positions outside the planet orbit that are generally not in line with the star.
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