Bennu

Definition

Bennu is a near-Earth asteroid that belongs to the category of primitive asteroids, which are considered to be remnants from the early solar system. It gained significant attention when NASA's OSIRIS-REx mission visited Bennu to collect samples, providing crucial insights into the composition and structure of asteroids, which are important for understanding the origins of organic compounds and water in the solar system.

5 Must Know Facts For Your Next Test

1. Bennu is approximately 500 meters in diameter and has a distinctive, rugged surface covered with boulders and fine-grained material.
2. It is classified as a B-type asteroid, which indicates that it has a high carbon content and a composition similar to that of carbonaceous chondrites.
3. The OSIRIS-REx spacecraft arrived at Bennu in December 2018 and successfully collected samples in October 2020, with plans to return them to Earth in September 2023.
4. Studying Bennu's samples will help scientists understand the conditions of the early solar system, including the processes that led to the formation of planets and possibly life.
5. Bennu is also known for its potential impact threat to Earth; it has a probability of colliding with Earth in the late 22nd century, making it an important target for planetary defense research.

Review Questions

• How does studying Bennu contribute to our understanding of the early solar system?
  • Studying Bennu provides valuable insights into the composition and structure of primitive asteroids, which are remnants from the early solar system. By analyzing samples returned by the OSIRIS-REx mission, scientists can investigate the materials that were present during the formation of planets. This understanding can reveal how organic compounds and water may have been delivered to Earth, offering clues about the origins of life.
• What are the implications of Bennu's classification as a carbonaceous asteroid for our understanding of asteroids and their role in planetary formation?
  • Bennu's classification as a carbonaceous asteroid indicates that it contains significant amounts of carbon compounds, which are critical for understanding the building blocks of life. This classification suggests that asteroids like Bennu could have played a crucial role in delivering water and organic materials to early Earth. The study of such asteroids enhances our comprehension of how these celestial bodies contributed to planetary formation and possibly the emergence of life.
• Evaluate the importance of the OSIRIS-REx mission in advancing our knowledge about asteroids like Bennu and their potential impact on Earth.
  • The OSIRIS-REx mission is vital for advancing our knowledge about asteroids like Bennu because it not only aims to retrieve samples that can reveal information about the early solar system but also highlights planetary defense strategies. By understanding Bennu’s structure and composition, scientists can better assess its potential threat level regarding future impacts on Earth. Additionally, analyzing these samples allows researchers to explore how similar asteroids may have influenced the development of life on Earth and informs future exploration missions targeting potentially hazardous near-Earth objects.

Related terms

OSIRIS-REx: A NASA mission aimed at collecting samples from the asteroid Bennu and returning them to Earth for analysis, which helps researchers study the building blocks of life.

Carbonaceous Asteroids: A type of asteroid rich in carbon compounds, believed to hold organic materials and are thought to be the source of water and organic molecules on early Earth.

Sample Return Mission: A space mission designed to retrieve samples from an extraterrestrial body and bring them back to Earth for detailed analysis.