To test the collector, the researchers need asteroid-like materials, so Sears and his colleagues have ordered large bags of concrete, gravel, sand and iron filings to create different mixtures for use while in flight.
(Sears and his colleagues; have ordered; large bags of concrete, gravel, sand and iron filings; to create different mixtures for use) (large bags of concrete, gravel, sand and iron filings; to create; different mixtures; for use) (the researchers; need so; asteroid-like materials, so Sears and his colleagues have ordered large bags of concrete, gravel, sand and iron filings to create different mixtures for use while in flight)
Sears and his colleagues large bags of concrete, gravel, sand and iron filings the researchers
have ordered to create need so
large bags of concrete, gravel, sand and iron filings to create different mixtures for use
different mixtures for use
asteroid-like materials, so Sears and his colleagues have ordered large bags of concrete, gravel, sand and iron filings to create different mixtures for use while in flight