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The planet's period of retrograde motion is 20 days on either side of the inferior conjunction. In fact, through a telescope Venus at greatest elongation appears less than half full due to Schröter's effect first noticed in 1793 and shown in 1996 as due to its thick atmosphere. Venus in daylight at 5 p.m. in the southern hemisphere ...
During the mapping cycle 1 (left-looking) radar surface mapping on Venus (September 15, 1990 to May 15, 1991), around 70% of the Venusian surface was mapped by synthetic aperture radar. In cycle 2 (right-looking), 54.5% of the surface was mapped, mainly the south pole regions and gaps from cycle 1 during May 15, 1991 to January 14, 1992.
This false-color radar image taken by the Cassini orbiter provides convincing evidence for large bodies of liquid methane on Titan. Images taken during a fly-by of the moon on July 22, 2006 show more than 75 large bodies of liquid ranging in diameter from three to 70km (1.9 to 43.6 mi) in the moon's northern hemisphere.
Venus will be the cornerstone of multiple planetary alignments in 2025, the first of which will unfold on Friday, Jan. 17, as it shines side-by-side with Saturn. The duo will appear high in the ...
Mapped (along with Venera 16) the northern hemisphere down to 30 degrees from North (resolution 1–2 km) — Venera 16: 4V-2: Orbiter: 7 June 1983: 14 October 1983 — Mapped (along with Venera 15) the northern hemisphere down to 30 degrees from North (resolution 1–2 km) — Vega 1: 5VK No. 902: Flyby and Lander: 15 December 1984: 11 June ...
Venus is the second planet from the Sun.It is a terrestrial planet and is the closest in mass and size to its orbital neighbour Earth.Venus has by far the densest atmosphere of the terrestrial planets, composed mostly of carbon dioxide with a thick, global sulfuric acid cloud cover.
Venus appears beside a crescent Moon in the night sky in Kolkata, India [Getty Images] Quadrantid meteor shower is observed in the night sky over the Great Wall on January 4, 2025 in Beijing ...
The Magellan spacecraft was a 1,035-kilogram (2,282 lb) robotic space probe launched by NASA on May 4, 1989. Its mission objectives were to map the surface of Venus by using synthetic-aperture radar and to measure the planetary gravitational field.