Match List–I with List–II :
List—I (Space Mission)
a. Cassini-Huygens
b. Juno
c. Artemis
d. VERITAS
List—II (Exploration)
1. Jupiter
2. Saturn and its rings
3. Venus
4. Human Space-flight—Moon to Mars

Question

Match List–I with List–II :
List—I (Space Mission)
a. Cassini-Huygens
b. Juno
c. Artemis
d. VERITAS
List—II (Exploration)
1. Jupiter
2. Saturn and its rings
3. Venus
4. Human Space-flight—Moon to Mars
Select the correct answer using the codes given below.

UnlockIAS · Accepted Answer

Correct — A, a b c d 2 1 4 3. Take the four missions in turn and each one carries its own date, its own target and its own status. Cassini-Huygens goes with Saturn and its rings: a joint NASA / European Space Agency / Italian Space Agency mission launched on 15 October 1997, which NASA's own mission page lists with target "The Saturn System" and status "Successful". It arrived on 1 July 2004 as the first spacecraft ever to orbit Saturn, released the ESA-built Huygens probe on 24 December 2004, and that probe descended to the surface of Titan on 14 January 2005 — still the only landing ever made in the outer solar system. Across 294 Saturn orbits, 127 targeted Titan flybys and 23 Enceladus flybys it found subsurface oceans on two moons; the Saturn system was its home for thirteen years, and it was deliberately plunged into the planet in 2017 so that those moons could not be contaminated. Juno goes with Jupiter: launched on 5 August 2011 from Cape Canaveral aboard an Atlas V, it entered orbit around Jupiter on 4 July 2016 after a five-year, 1.7-billion-mile (2.8-billion-kilometre) cruise, and its first orbit alone stretched across 53 days from the cloud tops to the edge of the planet's magnetic field. It found networks of vast storms at Jupiter's poles, active volcanoes and lakes of lava on Io, and winds reaching hundreds of miles into the interior. Artemis goes with Human Spaceflight—Moon to Mars: it is NASA's crewed programme, not a probe. Artemis I flew in 2022, when the Space Launch System sent an uncrewed Orion capsule on a 1.4-million-mile journey beyond the Moon and back; Artemis II is the programme's first flight with astronauts aboard. VERITAS goes with Venus: "Venus Emissivity, Radio Science, InSAR, Topography and Spectroscopy", a solar-powered orbiter led by Principal Investigator Sue Smrekar and managed by NASA's Jet Propulsion Laboratory, which will aerobrake into a near-polar orbit at a science altitude of about 250 miles (400 km) and return the first new data on the Venusian surface in more than three decades. Hence a-2, b-1, c-4, d-3.

Why the other options are wrong — (b) Sends Cassini-Huygens to Venus and VERITAS to Saturn — it gets Juno and Artemis right and swaps only the outer pair, which makes it the trap for a candidate who knows two of the four names. This is also the classic error on this topic in Indian exams: UPSC planted precisely this mis-pairing in 2014, offering "Cassini-Huygens : Orbiting the Venus and transmitting data to the Earth" and marking it incorrect. Cassini's target is listed by NASA as the Saturn system and its status as successful; no part of the mission ever went near Venus except as a gravity-assist flyby on the way out.  (c) Opens correctly with Cassini-Huygens at Saturn but then sends Juno to Venus and VERITAS to Jupiter — so it dies on the second pairing, the easiest one on the list to fix. Juno is named after the Roman goddess who was Jupiter's wife, and NASA tells the story deliberately: Jupiter hid his misbehaviour in a veil of clouds and Juno swooped down and saw through it, which is exactly what the spacecraft does to the planet's cloud deck. It has been in Jupiter orbit since 4 July 2016, and its extended mission ran through September 2025 across Ganymede, Europa and Io.  (d) Only Juno is placed correctly. It sends Cassini-Huygens to Venus, makes Artemis a mission to Saturn's rings and turns VERITAS into a human spaceflight programme. Two structural clues kill it without any recall of dates: Artemis is the only crewed item in List-I, and List-II entry 4 is the only entry that names human spaceflight rather than a planet, so those two must pair. VERITAS is an uncrewed radar-and-spectroscopy orbiter whose whole purpose is to improve on the Magellan radar maps of Venus by orders of magnitude; it carries no astronauts and never will.

Concept: Planetary missions are easiest to hold in memory by their class, their agency and their name. Cassini-Huygens was a Flagship-class mission — the largest and costliest tier, about USD 3.9 billion, built with two partner agencies and designed to live at one destination for years rather than fly past it. Juno belongs to the medium New Frontiers tier: a hexagonal body about 11.5 feet (3.5 m) across with three huge solar arrays that give it a span of more than 66 feet (20 m), spinning twice a minute so that its fixed instruments each get a turn at the target during a two-hour pole-to-pole pass. VERITAS belongs to the small, competitively selected Discovery tier, and its team proposed it three times — twice to Discovery and once to New Frontiers — before it was picked, which is why it flies with a compact payload and leans on international contributions from Italy, Germany and France. Artemis is not a robotic probe at all but NASA's human spaceflight programme, which is why List-II describes it in terms of astronauts rather than a planet. And the names themselves encode the targets: Juno was Jupiter's wife in Roman mythology, Artemis was Apollo's twin sister and a Moon goddess — so the programme that follows Apollo back to the Moon carries her name — and veritas is Latin for "truth", the mission being built to reveal the truth of how Venus and Earth diverged.

State PCS 2023 Q2 — Science & Technology PYQ with Answer

State PCS 2023 Q2 — Science & Technology PYQ with Answer