[ad_1]
|
Hearken to this text  |
NASA’s JPL group has had an enormous, profitable 12 months. In February, the group landed the Perseverance rover on Mars. In September, the rover cored its first rock pattern.
Thus far, Perseverance has used 5 of its 43 pattern tubes, 4 for rock samples and one for a pattern of the Martian ambiance. Now, NASA’s group is engaged on the subsequent, difficult step in Perseverance’s mission: bringing these rock samples to Earth.
This a part of the mission is predicted to take a decade of labor, a number of NASA facilities and NASA’s European companions on the European House Company (ESA).
NASA’s plan is to ship one other lander to mars. This subsequent lander shall be geared up with a rover that may journey to Perseverance and accumulate its samples, together with a rocket that may take the samples to an ESA spacecraft orbiting Mars.
Within the orbiter, the capsule shall be prepped for its last journey to Earth. The orbiter might want to seal the pattern, sterilize the seal and place the pattern into an Earth entry capsule. From there, it’ll be despatched to Earth.
NASA’s JPL group has had 9 profitable Mars landings, however there are a couple of firsts concerned on this formidable mission. For the lander to have the ability to carry and launch a rocket on Mars, it should should be sturdy. Proper now, it weighs about 5,291 lbs, making it the most important and heaviest spacecraft of its form to go to Mars.
Moreover, the rocket launching from the lander, known as the Mars Ascent Automobile, would be the first rocket ever fired off of one other planet.
The testing
NASA’s Pattern Retriever Lander weighs virtually twice as a lot because the Perseverance rover, which was lowered to the floor of Mars utilizing cables from a rocket-powered jet pack.
Retrorockets will sluggish its descent, however the lander gained’t have a jetpack to assist lower the impression of landing, so it’ll all must be absorbed by the legs of the lander.
A group in a warehouse-like area at JPL, led by Pavlina Karafillis, has been making an attempt to foretell how the lander will act on Mars. To take action, they’ve been repeatedly dropping a prototype lander, utilizing high-speed cameras to watch the methods the legs of the prototype slam onto the bottom.
On every leg of the prototype is a QR-like code that helps the digital camera to trace the lander’s actions. The prototype is barely a 3rd of the burden of the lander that may go to Mars, which is able to assist the scientists learn the way the lander will transfer in Mars’ low gravity. The scientists will drop a full-scale lander as properly.
“The final step of the journey is basically necessary,” Karafillis mentioned. “There’s all types of touchdown situations you need to take into consideration, like rocks, or actually gentle sand, or coming in at an angle. Because of this we’ve to do all this testing.”
After touchdown, the scientists want to contemplate the way to launch a two-stage rocket from the lander. The rocket onboard the lander shall be 9 toes lengthy. Its weight, mixed with the exhaust, may make the lander slip or tilt misplaced.
To forestall this from taking place, the scientists have created a system the place the rocket is tossed into the air earlier than it ignites. The method is known as vertically ejected managed tip-off launch (VECTOR).
The VECTOR system additionally provides a slight rotation to the rocket throughout launch. This pitches the rocket up and away from the crimson planet’s floor, that means the lander could possibly be oriented incorrectly or on a slope, and the rocket may nonetheless efficiently launch.
The rocket shall be tossed into the air at a fee of 16 ft per second. Throughout testing, an 881 lb take a look at rocket was tossed 11 ft to the air utilizing a cradle geared up with gas-powered pistons. Cables suspended from a 44 ft tower offloaded over half of the take a look at rocket’s weight to simulate Martian gravity.
“It’s sort of like being on a very quick curler coaster when somebody hits the breaks,” mentioned Chris Chatellier, the system’s lead engineer at JPL. “There are a variety of security elements to contemplate. Testing occurs in a really managed sequence of occasions with everybody exterior of the constructing.”
Chatellier’s group has already completed 23 checks this 12 months, and have made changes to the rocket’s mass and heart of gravity alongside the best way. The plan is to check a heavier rocket taking pictures larger into the air subsequent 12 months.
[ad_2]
