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Related Concept Videos

Robbers Cave04:49

Robbers Cave

During the 1950s, the landmark Robbers Cave experiment demonstrated that when groups must compete with one another, intergroup conflict, hostility, and even violence may result. At the Oklahoman summer camp, two troops of boys—termed the Rattlers and the Eagles—took part in a week-long tournament. During this time, their negativity culminated in derogatory name-calling, fistfights, and even vandalism and destruction of property. However, this work also revealed that such tension could be...
Water and Mineral Acquisition02:34

Water and Mineral Acquisition

Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
Local Attraction01:22

Local Attraction

Local attraction refers to disturbances in compass readings caused by magnetic influences from nearby objects such as metal fences, buried pipes, vehicles, buildings, power lines, or natural iron ore deposits. Small items like wristwatches, steel tools, or belt buckles can also interfere with the compass by creating local magnetic fields that distort the Earth's natural magnetic field. These distortions lead to inaccurate readings, posing navigation and land surveying challenges.Local...
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
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Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point served as...

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Related Experiment Video

Updated: Jul 17, 2026

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

Adventures in near-Earth object exploration.

Erik Asphaug1

  • 1Earth Sciences Department, University of California, Santa Cruz, CA 95064, USA. asphaug@pmc.ucsc.edu

Science (New York, N.Y.)
|June 3, 2006
PubMed
Summary

Asteroid exploration is vital for planetary defense. Japan's pioneering sample return mission demonstrates that landing on these low-gravity bodies is now achievable, overcoming previous challenges.

Area of Science:

  • Planetary Science
  • Space Exploration
  • Robotics

Background:

  • Asteroids pose a significant threat to Earth.
  • Asteroid exploration is a key objective for both robotic and human space missions.
  • The low-gravity environment of asteroids presents unique landing challenges.

Purpose of the Study:

  • To assess the feasibility of asteroid sample return missions.
  • To overcome the challenges associated with landing on low-gravity celestial bodies.
  • To advance the capabilities of space exploration technology.

Main Methods:

  • A novel mission was designed and executed by Japan.
  • The mission focused on the first attempt at asteroid sample return.
  • Technological advancements were employed to address low-gravity landing challenges.

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Last Updated: Jul 17, 2026

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Deployment and Retrieval of Mineral Samplers
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Main Results:

  • The mission successfully demonstrated the possibility of asteroid sample return.
  • Landing on an asteroid in a low-gravity environment is now within reach.
  • This mission marks a significant step forward in space exploration capabilities.

Conclusions:

  • Asteroid sample return missions are feasible despite environmental challenges.
  • Japan's mission has paved the way for future asteroid exploration endeavors.
  • The success of this mission enhances prospects for planetary defense and scientific discovery.