Science & Technology: Space, Computers & Scientific Studies

Graphology is the study and analysis of handwriting to determine personality traits and psychological characteristics. The term derives from Greek 'grapho' (writing) and '-logy' (study of). It's often used in forensic document examination and psychological profiling.

Osteology is the scientific study of bones, including their structure, function, and development. The term comes from Greek 'osteon' (bone) and '-logy' (study of). It's a sub-discipline of anatomy and paleontology. Teeth are included because they share similar structural and developmental characteristics with bones.

Palaeontology (or Paleontology) is the scientific study of fossils to understand the history of life on Earth. The term combines Greek 'palaios' (ancient), 'ontos' (being), and '-logy' (study of). It examines evolutionary relationships, extinction events, and ancient ecosystems.

Ichthyology is the scientific study of fish, derived from the Greek word 'ichthys' meaning fish. The other options are made-up terms not recognized in any scientific context.

Seismology is the scientific study of earthquakes and the propagation of elastic waves through the Earth. Derived from the Greek 'seismos' meaning earthquake or shaking. The other options are not real scientific terms.

Oology is the scientific study of eggs, particularly birds' eggs. The term comes from the Greek 'oon' meaning egg. Enology is the study of wine, and the other options are not recognized scientific terms.

Entomology is the scientific study of insects, derived from the Greek 'entomon' meaning insect (literally 'cut up' referring to segmented bodies). The other options are not recognized scientific terms.

Vulcanology (or volcanology) is the scientific study of volcanoes. The spelling 'vulcanology' is an accepted variant, though 'volcanology' is more common. Both derive from Vulcan, the Roman god of fire. The other options are not valid scientific terms.

Herpetology is the branch of zoology concerned with the study of reptiles and amphibians, including snakes, lizards, turtles, frogs, and salamanders. The term comes from the Greek word 'herpeton' meaning creeping thing. Snakology, reptology, and shakology are not recognized scientific terms.

China's space program shattered this myth. Yang Liwei, China's first astronaut (taikonaut), confirmed in 2003 after his Shenzhou 5 mission that the Great Wall was not visible from space. This definitive statement from China's space mission conclusively debunked the long-standing myth.

Mercury is the smallest planet in our solar system, with a diameter of about 4,880 km. It's also the closest planet to the Sun. Pluto was reclassified as a dwarf planet in 2006, so it's no longer considered a planet.

Mercury is often called the Moon's twin because of their similar physical characteristics. Both have heavily cratered surfaces, no atmosphere, and comparable size (Mercury's diameter is only about 1.4 times that of the Moon). Their surface appearance and geological features are remarkably alike.

Venus is called Earth's twin because of their similar size (Venus is about 95% of Earth's diameter) and mass. Both are terrestrial planets with comparable density and gravity. Despite being the closest planet to Earth, their surface conditions are vastly different due to Venus's extreme greenhouse effect.

Venus is the correct answer. In Indian astronomy, Venus is called 'Shukra' (the planet of the sage Shukra), Babylonians knew it as 'Ishtar' (goddess of love and war), and Romans called it 'Lucifer' meaning 'light-bringer' or 'morning star' - referring to its appearance as the brightest object in the morning sky.

Venus is named after the Roman goddess Venus, who was the goddess of love, beauty, and fertility. This naming follows the Roman tradition of naming planets after their major deities. Venus was chosen because the planet appeared bright and beautiful in the sky.

The Sea of Tranquility (Mare Tranquillitatis) is a lunar mare on the Moon's surface. It's not an ocean on Earth. This site became famous as the landing location of Apollo 11 in 1969, the first manned Moon landing.

Vinod Khosla was one of the co-founders of Sun Microsystems in 1982 along with Scott McNealy, Bill Joy, and Andy Bechtolsheim. He is a well-known Indian-American entrepreneur and venture capitalist. The other names (Vinod Dahm, Arun Netravalli, Sanjay Tejwrika) are not correct co-founders.

Vinod Dahm was the lead architect of the Pentium chip at Intel. The other options are prominent Indian-origin executives in tech and banking, but not associated with the Pentium's development. Vinod Khosla co-founded Sun Microsystems, while Victor Menezes and Rana Talwar were banking executives.