Science

BWdem4life

(2,457 posts) Mon Sep 12, 2022, 01:48 AM Sep 2022

Nasa to crash $330m spacecraft into asteroid to see if impact can alter course

In a few weeks, Nasa controllers will deliberately crash their $330m Dart robot spacecraft into an asteroid. The half-tonne probe will be travelling at more than four miles a second when it strikes its target, Dimorphos, and will be destroyed.

The aim of this kamikaze science mission is straightforward: space engineers want to learn how to deflect asteroids in case one is ever discovered on a collision course with Earth. Observations of Dart’s impact on Dimorphos’s orbit will provide crucial data about how well spacecraft can protect Earth from asteroid armageddon, they say.

“We know asteroids have hit us in the past,” said Professor Alan Fitzsimmons, an astronomer at Queen’s University Belfast. “These impacts are a natural process and they are going to happen in the future. We would like to stop the worst of them.

“The problem is that we have never tested the technology which will be needed to do that. That is the purpose of Dart,” said Fitzsimmons, a member of the science team for the Double Asteroid Redirection Test (Dart) mission. Launched last November, the probe is scheduled to strike its target in the early hours of 27 September, BST. By carefully studying the asteroid’s path after the collision, scientists believe they will better understand how similar collisions could be used to deflect Earth-bound asteroids and comets.

more:

https://www.theguardian.com/science/2022/sep/03/nasa-to-crash-spacecraft-into-asteroid-dart-dimorphos-collision-course

5 replies

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Highlight:

Nasa to crash $330m spacecraft into asteroid to see if impact can alter course (Original Post) BWdem4life Sep 2022 OP

Sounds like.the beginning of a disaster movie. RandySF Sep 2022 #1

I have a better idea. trusty elf Sep 2022 #2

I would have sold them my 1973 Dodge Dart for $750 in the interest of science Mr. Ected Sep 2022 #3

question Slammer Sep 2022 #4

No question they can deliver a craft onto the target. They've done before. Is that your question? Bernardo de La Paz Sep 2022 #5

RandySF

(70,306 posts)

1. Sounds like.the beginning of a disaster movie.

Reply to BWdem4life (Original post)

Mon Sep 12, 2022, 01:51 AM

Sep 2022

trusty elf

(7,476 posts)

2. I have a better idea.

Reply to BWdem4life (Original post)

Mon Sep 12, 2022, 03:18 AM

Sep 2022

Mr. Ected

(9,686 posts)

3. I would have sold them my 1973 Dodge Dart for $750 in the interest of science

Reply to BWdem4life (Original post)

Mon Sep 12, 2022, 03:38 AM

Sep 2022

If only they'd asked.

Slammer

(714 posts)

4. question

Reply to BWdem4life (Original post)

Mon Sep 12, 2022, 04:20 AM

Sep 2022

Of course a massive impact can alter the course of the an object. That's basic physics and can be proved mathematically without an experiment.

The question is whether they can deliver the craft onto a target.

There's also a question of whether the object being hit is solid enough to survive the hit intact (rather than splintering into pieces flying off into random directions).

Asteroids, likely solid enough.

Comets? Certainly massive enough to really mess up the Earth if one ever impacted here. But probably not solid enough for a solid deflect (like hitting one pool ball with another). A comet would more likely fracture and the pieces might or might not continue on to devastate the planet.

Bernardo de La Paz

(50,821 posts)

5. No question they can deliver a craft onto the target. They've done before. Is that your question?

Reply to Slammer (Reply #4)

Mon Sep 12, 2022, 04:57 AM

Sep 2022

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