api: YAML JSON TOON Database
version: 1.0.0
format: toon
category:
  id: 351
  slug: astronomy
  name: Astronomy
  description: "Celestial objects, phenomena, and cosmology."
  icon: globe
  created_at: 1783090350
  dataset_count: 5
  topic:
    overview: "Astronomy reference data covers what is in the sky and how humans learned about it: the planets and other bodies of the Solar System, the phases of the Moon that follow from its orbit, the types of stars and their life stages, the constellations used to map the sky, and the missions that carried instruments and people beyond Earth. Distances and periods are measured quantities that improve over time, so the numbers are the best-known values at a point in time, while the classifications (planet, dwarf planet, star type) are partly conventions set by the International Astronomical Union."
    key_ideas[7]{term,meaning}:
      Astronomical unit,"About 149.6 million kilometers: the mean distance from Earth to the Sun, used to measure distances inside the Solar System."
      Orbital period,"The time a body takes to complete one orbit. It grows with the orbit's size, as described by Kepler's third law."
      Dwarf planet,A body orbiting the Sun that is round but has not cleared its orbital neighborhood. Pluto and Ceres are examples.
      Main sequence,The long stable phase of a star's life when it fuses hydrogen into helium in its core.
      Synodic month,"The cycle of lunar phases, about 29.5 days, which is longer than the Moon's orbit relative to the stars."
      Light-year,"The distance light travels in one year, about 9.46 trillion kilometers; a unit of distance, not of time."
      Constellation,"A region of the sky, officially 88 of them, and traditionally a pattern of stars. The stars in one are usually at very different distances."
    pitfalls[4]: "Mixing astronomy with astrology. The zodiac signs and the astronomical constellations do not line up with the dates, because of precession and unequal constellation sizes.",Treating moon counts and similar tallies as fixed. They change as new moons are confirmed.,"Reading a light-year as a unit of time, or assuming all stars in a constellation are close to each other.","Quoting planetary distances as constants; orbits are ellipses, so distances vary through the year."
    agent_tips[3]: "Give a measured value with its unit and, when it changes, the date or source it comes from.",Say whether a classification such as 'planet' is an IAU convention when the question is about Pluto or other borderline bodies.,"When asked about horoscopes or zodiac signs, answer the astronomical question accurately and label astrology as a separate, non-scientific tradition."
    start_with[2]: solar-system-planets,types-of-stars
datasets[5]{id,slug,title,description,tags,view_count,created_at,entry_count,summary}:
  2461,phases-of-moon,Phases of the Moon,The primary phases of the lunar cycle.,"astronomy,moon,phases",47,1792832553,8,"The eight phases of the Moon in order, from new moon through full moon and back, each with a short description of how much of the near side is lit as seen from Earth."
  2485,solar-system-planets,Solar System Planets,The eight planets of the solar system.,"astronomy,planets,solar-system",35,1792832553,10,"The eight planets of the Solar System with their type, mean distance from the Sun in astronomical units, orbital period in days and number of known moons, extended with two well-known dwarf planets, Ceres and Pluto."
  2489,space-missions-milestones,Space Mission Milestones,Landmark missions in the history of space exploration.,"astronomy,space,missions",41,1792832553,25,"Milestones in space exploration from Sputnik 1 to the James Webb Space Telescope, each with its year and what it achieved. Added entries cover the first human in space, first Moon landings and orbits, the first planetary landers, comet landing, rovers and helicopter flight, and the Artemis I test flight."
  2508,types-of-stars,Types of Stars,Major stages and classifications of stars.,"astronomy,stars,classification",42,1792832553,13,"The main kinds of stars and stellar remnants with a description and a well-known example: main sequence stars, red giants, white dwarfs, neutron stars, black holes and supergiants, plus red and brown dwarfs, variable stars, pulsars, magnetars, Wolf-Rayet stars and binaries."
  2347,constellations-zodiac,Zodiac Constellations,The twelve constellations of the zodiac.,"astronomy,constellations,zodiac",43,1792832553,13,"The twelve traditional zodiac constellations with their symbols and the conventional date ranges of the Sun's passage through them in astrology. It also notes Ophiuchus, the thirteenth constellation that the ecliptic crosses."