Medium Level – GK Questions

Objects like 3753 Cruithne exhibit horseshoe orbits relative to Earth, exchanging angular momentum without collision due to 1:1 mean-motion resonance.

Chang'e 5 collected 1.731 kg of basaltic regolith from Mons Rümker in Oceanus Procellarum, youngest lunar samples (~2 Ga) filling age gap.

IRNSS was officially renamed NavIC ('Navigation with Indian Constellation') in April 2016 by PM Modi, emphasizing indigenous capability.

3D-printed injectors, chambers, and nozzles consolidate assemblies into single parts, cutting weight/cost; used in SpaceX SuperDraco and ISRO SCE-200 engines.

Columbia's STS-93 mission (July 1999) deployed Chandra, the most powerful X-ray telescope, studying high-energy cosmic phenomena.

The 3.6m DOT at Devasthal, Uttarakhand, operated by ARIES, is India's largest optical telescope, supporting exoplanet and transient astronomy.

S-band (2-4 GHz) handles LEO/GEO TT&C; X-band (7-8 GHz) provides higher data rates for deep space links with reduced interference.

Caloris Basin (~1,550 km diameter) formed from a giant impact early in Mercury's history, causing antipodal chaotic terrain from seismic focusing.

HLVM3 features triple-redundant avionics, enhanced fault detection, and crew escape integration, meeting stringent human-rating standards.

Giant molecular clouds (10-20 K, 10²-10⁶ particles/cm³) shield molecules from UV radiation, enabling gravitational collapse and star formation.

Neil Armstrong and David Scott docked Gemini 8 with Agena Target Vehicle on Mar 16, 1966, achieving first orbital docking despite subsequent emergency undocking.

Gaofen ('High Resolution') satellites form China's CHEOS system, providing sub-meter imagery for civilian/military applications since 2013.

Tape-spring hinges provide reliable deployment without motors/latches, reducing mass/volume for large solar arrays on GEO and deep space missions.

Ganymede possesses a dipole magnetic field generated by dynamo action in its liquid iron core, creating a mini-magnetosphere within Jupiter's magnetosphere.

Sentinel constellation provides free/open Earth observation data for environmental monitoring, managed jointly by ESA and EUMETSAT under EU Copernicus program.

NCSAI in Gandhinagar will integrate space applications with informatics for governance, disaster management, and resource planning.

MLI consists of reflective foil layers separated by spacers, minimizing radiative heat transfer and maintaining thermal stability in space environment.

Titan's dense atmosphere is ~95% nitrogen with ~5% methane, resembling early Earth's composition but at cryogenic temperatures.

Apollo 15 (July-Aug 1971) deployed the first Lunar Roving Vehicle, extending exploration range beyond walking distance and collecting diverse samples.

All three Rubidium clocks on IRNSS-1A failed in 2016-17, degrading positioning accuracy; NVS-01 launched May 2023 with indigenous clocks as replacement.