Complex sentence: This figure was an estimate, and was later superseded by actual measurements made by satellite-mounted detectors; for example an article published in New Scientist in 1976 concluded that every year 200 million tons of dust enters our solar system.
Split into simpler sentences: This figure was an estimate, and was later superseded by actual measurements made by satellite-mounted detectors. For example, in 1976, an article was published in New Scientist which concluded that every year 200 million tons of dust enters our solar system.