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The All Sky Automated Survey (ASAS) is a Polish project implemented on 7 April 1997 to do photometric monitoring of approximately 20 million stars brighter than 14 magnitude all over the sky. [1] The automatic telescopes discovered two new comets in 2004 and 2006.
It was used to track the alignment of certain stars called decans or "baktiu" in the Ancient Egyptian. When visible, the stars could be used to measure the time at night. There were 10 stars for the 10 hours of the night; the day had a total of 24 hours including 12 hours for the day, 1 hour for sunset, and 1 hour for sunrise.
Non-circumpolar stars are visible only during certain days or seasons of the year. The night sky, divided into two halves. Declination (blue) begins at the equator (green) and is positive northward (towards the top), negative southward (towards the bottom). The lines of right ascension (blue) divide the sky into great circles, here 1 hour apart.
With this orientation, the navigator can hold the star chart overhead, and the arrangement of the stars on the chart will resemble the stars in the sky. [1] In the star charts, constellations are labelled with capital letters and indicated by dotted lines collecting their stars. The 58 selected stars for navigation are shown in blue and ...
Today, Venus is referred to as the "Christmas Star" because it will be the brightest object in the sky, besides the moon and sun, Throop said. PHOTO: Starry sky (Picture Alliance/DPA via Getty Images)
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The Right ascension of the star is about 18 h. 18 h means it is a March early-hours star and in blue sky in the morning. If 12 h RA, the star would be a March all-night star as opposite the March equinox. If 6 h RA the star would be a March late-hours star, at its high (meridian) at dusk.
Night Sky is a stargazing reference app, where the user can explore a virtual repreentation of the night sky to identify stars, planets, constellations and satellites. [1] The app is developed specifically for iOS, tvOS and watchOS devices. Night Sky was first released on November 1, 2011 for iOS, and has had multiple updates since launch. [2]