Question

Q.1. Read the following passage carefully and answers the question
1. US space agency NASA's engineers are developing drones that can fly to areas inaccessible to rovers, such as the
shades regions of a crater, on Mars, asteroids and the Moon to gather samples.
2. The flying robotics vehicles-similar to quad-copters but designed for the thin atmosphere of Mars and the airless
voids of asteroids and the Moon-would use a lander as a base to replenish batteries and propellants between
fights.
3. "This is prospecting robot," Said Rob Mueller, senior technologist for advanced project at Swamps Works at
NASA's Kennedy Space Centre in Florida. "The first step in being able to use resources on Mars or on asteroids
is to find out where the resources are. They are most likely in hard-to-access areas where there is permanent
shadow. Some of the crater walls are angled 30° or more, and that's far too steep for a traditional rover to
navigate and climb," he said.
4. The machines being built fall under the name Extreme Access Flyers. Their designers intended to create vehicles
that can travel into the shaded regions of a crater and pull out small amounts of soil to see whether it holds the
water-ice promised by reading from orbiting spacecraft.
5. Running on propellants made from resources on the distant worlds, the machines would be small enough for a
lander to bring several of them to the surface at once. That's way, if one falls, the mission is not lost.
6. Cold-gas jets using oxygen or stream water vapors will take on the lifting and maneuvering duties performed by
rotors on Earth. For navigation, the team is programming the flyer to recognize terrain and landmarks and guide
itself to areas controllers on Earth send it to or even scout on its own the best places to take samples from. "It
would have enough propellant to fly for number of minutes on Mars or on Moon, hours on an asteroid," said
Mike DuPuis, co-investigator of the Extreme Access Flyer Project.
7. For the sampling itself, designers currently envision a modular approach that would let the flyer take one tool a
time to a sample area to gather about seven grammes of material at a time.
8. That's enough for instruments to analyses at throughout the course of many flights, is enough to gather samples
that would show Earth-bound scientists a complete geological picture of an area.
9. In the Swamps Works Laboratory, the team has assembled several moon designed to test aspects of the final
machine.​


ques1 : how are drones better than rovers?

Answer 1

Answer:

Christopher Hemsworth[1] (born 11 August 1983)[2] is an Australian actor. He first rose to prominence in Australia playing Kim Hyde in the Australian television series Home and Away (2004–07) before beginning a film career in Hollywood. Hemsworth is best known for playing Thor in eight Marvel Cinematic Universe films, beginning with Thor (2011) and appearing most recently in Avengers: Endgame (2019), which established him as one of the leading and highest-paid actors in the world.[3][4]

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