In News:

NASA scientists announced that the Parker Solar Probe survived the closest-ever approach to the Sun. The craft was operating normally after it passed just 6.1 million km from the solar surface.

About the Parker Solar Probe:

• Launched: August 12, 2018, as part of NASA’s Living With a Star program.
• Named After: Eugene Newman Parker, a solar astrophysicist, marking the first NASA mission named after a living researcher.
• Mission Objectives:
  • To study the Sun’s corona and the solar wind, investigating why the corona is hotter than the Sun’s surface.
  • To explore the origins of solar winds and high-energy particles that impact space weather.
  • To understand the structure and dynamics of plasma and magnetic fields around the Sun.
  • To examine the mechanisms behind the acceleration and transportation of energetic particles.

Technological Feats:

• Heat Shield: Equipped with a 4.5-inch carbon-composite shield that withstands temperatures up to 1,377°C (2,500°F) while keeping the instruments cool at about 29.4°C (85°F).
• Speed: Travels at a speed of 692,000 km/h (430,000 mph), making it the fastest human-made object.
• Venus Flybys: Uses gravitational assists from Venus to gradually reduce its orbit and get closer to the Sun.

Historic Milestone:

• Closest Approach: On December 24, 2024, Parker Solar Probe reached a historic distance of 6.1 million km from the Sun's surface, the closest any human-made object has ever been.
  • Comparison: If the Earth and Sun were 1 meter apart, Parker Solar Probe would be just 4 cm from the Sun.
  • Temperature: At its closest, it endured temperatures up to 1,377°C.

Significance of the Mission:

• Scientific Contributions:
  • Solar Wind: Helps scientists understand the origins of solar winds, which affect space weather and Earth’s technological systems.
  • Corona Heating: Investigates why the Sun's corona is much hotter than its surface (a long-standing astrophysical mystery).
  • Space Weather: Provides critical data for predicting space weather events that can impact satellites, communication systems, and power grids on Earth.
• Practical Implications:
  • Improves understanding of space weather, potentially aiding in the protection of Earth’s infrastructure from solar storms.
• Technological and Engineering Marvel:
  • Demonstrates advanced spacecraft technology that can withstand extreme conditions close to the Sun.

Recent Developments:

• Data Collection: As the probe passed through the Sun’s outer atmosphere (the corona), it collected valuable data expected to answer fundamental questions about solar behavior.
• Communication: Despite the extreme proximity to the Sun, the probe sent back a signal on December 26, confirming its status.

Key Dates:

• Launch: August 12, 2018.
• Closest Approach: December 24, 2024.
• Data Expected: Detailed telemetry data on January 1, 2025.