Mars Exploration, Outer Solar System & Deep Space Probes
Uncrewed deep-space probes and robotic rovers have revolutionized planetary astronomy and astrophysics. NASA's robotic missions to Mars—including the Curiosity and Perseverance rovers—along with China's Zhurong rover have identified past lacustrine environments, organic molecules, and subsurface geological features. Beyond the inner planets, the Voyager 1 and Voyager 2 probes, launched in 1977, have crossed the heliopause to become humanity's first interstellar operational spacecraft. Missions like Cassini-Huygens (Saturn and Titan), Juno (Jupiter), and New Horizons (Pluto and the Kuiper Belt) revealed unprecedented planetary dynamics. In deep-space astrophysics, the James Webb Space Telescope, stationed at the second Sun-Earth Lagrange point (L2), utilizes infrared instruments to observe the earliest galaxies formed after the Big Bang.
Key Concepts & Examination Highlights
- Voyager 1, launched in 1977, became the first human-made object to cross into interstellar space in August 2012.
- NASA's Perseverance rover landed in Jezero Crater on Mars in February 2021, accompanied by the Ingenuity helicopter.
- The James Webb Space Telescope (JWST) operates at the second Lagrange point (L2), approximately 1.5 million kilometres from Earth.
- New Horizons conducted the first close-up flyby of the dwarf planet Pluto in July 2015.