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  2. Venus - Wikipedia

    en.wikipedia.org/wiki/Venus

    Consequently, Venus transits above Earth only occur when an inferior conjunction takes place during some days of June or December, the time where the orbits of Venus and Earth cross a straight line with the Sun. [185] This results in Venus transiting above Earth in a sequence of currently 8 years, 105.5 years, 8 years and 121.5 years, forming ...

  3. Musical notation - Wikipedia

    en.wikipedia.org/wiki/Musical_notation

    Following the key signature is the time signature. The time signature typically consists of two numbers, with one of the most common being 4 4. The top "4" indicates that there are four beats per measure (also called bar). The bottom "4" indicates that each of those beats are quarter notes. Measures divide the piece into groups of beats, and ...

  4. Observations and explorations of Venus - Wikipedia

    en.wikipedia.org/wiki/Observations_and...

    Venus in real colors, processed from clear and blue filtered Mariner 10 images. Observations of the planet Venus include those in antiquity, telescopic observations, and from visiting spacecraft. Spacecraft have performed various flybys, orbits, and landings on Venus, including balloon probes that floated in the atmosphere of Venus.

  5. 1769 transit of Venus observed from Tahiti - Wikipedia

    en.wikipedia.org/wiki/1769_transit_of_Venus...

    Fort Venus located on the north coast of Tahiti. On 3 June 1769, navigator Captain James Cook, naturalist Joseph Banks, astronomer Charles Green and naturalist Daniel Solander recorded the transit of Venus from the island of Tahiti during Cook's first voyage around the world. [1] During a transit, Venus appears as a small black disc travelling ...

  6. Timeline of discovery of Solar System planets and their moons

    en.wikipedia.org/wiki/Timeline_of_discovery_of...

    Mercury, Venus, Mars, Jupiter and Saturn were identified by ancient Babylonian astronomers in the 2nd millennium BC. [7] They were correctly identified as orbiting the Sun by Aristarchus of Samos, and later in Nicolaus Copernicus ' heliocentric system [8] (De revolutionibus orbium coelestium, 1543) Venus. 2nd Planet.

  7. Piano history and musical performance - Wikipedia

    en.wikipedia.org/wiki/Piano_history_and_musical...

    Piano history and musical performance. The modern form of the piano, which emerged in the late 19th century, is a very different instrument from the pianos for which earlier classical piano literature was originally composed. The modern piano has a heavy metal frame, thick strings made of top-grade steel, and a sturdy action with a substantial ...

  8. Phases of Venus - Wikipedia

    en.wikipedia.org/wiki/Phases_of_Venus

    The full cycle from new to full to new again takes 584 days (the time it takes Venus to overtake the Earth in its orbit). Venus (like the Moon) has 4 primary phases of 146 days each. The planet also changes in apparent size from 9.9 arc seconds at full (superior conjunction) up to a maximum of 68 arc seconds at new (inferior conjunction). [1]

  9. Edmond Halley - Wikipedia

    en.wikipedia.org/wiki/Edmond_Halley

    Edmond Halley. Edmond[2] (or Edmund) [3] Halley FRS (/ ˈhæli /; [4][5] 8 November [O.S. 29 October] 1656 – 25 January 1742 [O.S. 14 January 1741]) [6][7] was an English astronomer, mathematician and physicist. He was the second Astronomer Royal in Britain, succeeding John Flamsteed in 1720. From an observatory he constructed on Saint Helena ...