Atmospheric re-entry or entry at 100 km
Q. For Earth Atmospheric re-entry or entry occurs at- Published on 25 May 16a. Around 250 km
b. Around 400 km
c. Around 65 km
d. Around 100km
ANSWER: Around 100km
- For Earth, atmospheric entry occurs above the Kármán line at an altitude of more than 100 km (62 mi.) above the surface, while at Venus atmospheric entry occurs at 250 km (155 mi.) and at Mars atmospheric entry at about 80 km (50 mi.)
- The Kármán line, or Karman line, lies at an altitude of 100 kilometres (62 mi) above the Earth's sea level, and commonly represents the boundary between the Earth's atmosphere and outer space.
- Uncontrolled, objects accelerate through the atmosphere at extreme velocities under the influence of Earth's gravity. Most controlled objects enter at hypersonic speeds due to their suborbital (e.g., intercontinental ballistic missile reentry vehicles), orbital (e.g., the Space Shuttle), or unbounded (e.g., meteors) trajectories. Various advanced technologies have been developed to enable atmospheric reentry and flight at extreme velocities. Technologies and procedures allowing the controlled atmospheric entry, descent and landing of spacecraft are collectively abbreviated as EDL.
