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English: 2021 NASA Science Calendar 2021 NASA Science Calendar: Science and discovery have always required us to persevere. Through unprecedented times. Through storms and turbulence. Perseverance is more than facing challenges. It demonstrates our ability to hold on to a worthy goal with resilience.
The Astronomical Almanac [1] is an almanac published by the United Kingdom Hydrographic Office; it also includes data supplied by many scientists from around the world.On page vii, the listed major contributors to its various Sections are: H.M Nautical Almanac Office, United Kingdom Hydrographic Office; the Nautical Almanac Office, United States Naval Observatory; the Jet Propulsion Laboratory ...
Daily declination of the Sun, equation of time, sidereal time, planetary aspects, correct times of the eclipses, rising and setting times of the moon in different places, rising and setting times of the sun in Kolkata and seven other cities, monthly description of the night sky and locations of the stars and planets with explanatory sky maps ...
time-intervals between dates of heliacal risings; pairs of constellations which are simultaneously at the zenith and at the horizon; the path of the moon and planets. a solar calendar; the planets and the durations of their solar conjunctions; stellar risings and planetary positions for predicting weather and for adjusting the calendar
Date Time UTC Planet Angle distance Planet Elongation to Sun January 18, 2009 06:19:19 Mercury 3°15' north of Jupiter 4.7° East January 23, 2009 15:34:10 Venus 1°24' north of Uranus 46.3° East January 26, 2009 18:23:39 Mercury 4°25' north of Mars 13.5° West February 17, 2009 09:35:27 Mars 35' south of Jupiter 18.8° West February 24, 2009
In astronomy and celestial navigation, an ephemeris (/ ɪ ˈ f ɛ m ər ɪ s /; pl. ephemerides / ˌ ɛ f ə ˈ m ɛr ɪ ˌ d iː z /; from Latin ephemeris 'diary', from Ancient Greek ἐφημερίς (ephēmerís) 'diary, journal') [1] [2] [3] is a book with tables that gives the trajectory of naturally occurring astronomical objects and artificial satellites in the sky, i.e., the position ...
The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
Given the different Sun incidence in different positions in the orbit, it is necessary to define a standard point of the orbit of the planet, to define the planet position in the orbit at each moment of the year w.r.t such point; this point is called with several names: vernal equinox, spring equinox, March equinox, all equivalent, and named considering northern hemisphere seasons.