# DART spacecraft

#### brockrwood

##### Well-Known Member
TRF Supporter
See the link to news about the DART spacecraft that will soon slam into an asteroid. The idea is to give an asteroid a tiny nudge while it is far away from Earth, thereby making it change its orbit just a tiny bit.

This is just a test. The asteroid in question poses no danger to Earth.

It seems to me that a test like this is just to prove that the hardware works. Simple Newtonian physics (and geometry) tells us that, if an asteroid is on a collision course with Earth, but it is very far away, you only need to nudge it a tiny bit, make it change speed or course, or both, just a tiny bit, and it will miss Earth.

The challenge is identifying near Earth asteroids that are still far away, long enough in advance. Then you have time to send a billiard ball to the asteroid and knock it just a bit off course.

Money and resources should first be spent on the technology to identify and predict all of the asteroids that are big enough to catastrophically whack us.

#### Funkworks

##### Low Earth Orbit, obstructing Earth's view of Venus
Looks like the impact will occur on September 26, that’s in about 2 weeks.

Here’s the catalog of near Earth objects:

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#### hobie1dog

##### Subaholic
TRF Supporter
Most of these things are really far away if they're big.

#### Tyeeking

##### Well-Known Member
See the link to news about the DART spacecraft that will soon slam into an asteroid. The idea is to give an asteroid a tiny nudge while it is far away from Earth, thereby making it change its orbit just a tiny bit.

This is just a test. The asteroid in question poses no danger to Earth.

It seems to me that a test like this is just to prove that the hardware works. Simple Newtonian physics (and geometry) tells us that, if an asteroid is on a collision course with Earth, but it is very far away, you only need to nudge it a tiny bit, make it change speed or course, or both, just a tiny bit, and it will miss Earth.

The challenge is identifying near Earth asteroids that are still far away, long enough in advance. Then you have time to send a billiard ball to the asteroid and knock it just a bit off course.

Money and resources should first be spent on the technology to identify and predict all of the asteroids that are big enough to catastrophically whack us.
Why bother. Daily we’re told that climate change is the “existential threat” that will be irreversible in a few short years.

#### Funkworks

##### Low Earth Orbit, obstructing Earth's view of Venus
Why bother. Daily we’re told that climate change is the “existential threat” that will be irreversible in a few short years.

You can start by just looking at the numbers and graphs;

If you can interpret the numbers or understand explanations by the experts, you don't have to read any random news article out there. Those are written by journalists to summarize things for a wide audience. Just find articles having that level of detail you prefer instead, whatever it is.

As for DART's mission and the NEO catalog, they sounds to me like a good way to use aerospace knowledge and resources. As good as any other.

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#### Funkworks

##### Low Earth Orbit, obstructing Earth's view of Venus
Impact in 4 days.

#### Funkworks

##### Low Earth Orbit, obstructing Earth's view of Venus
Impact very soon now. Live coverage:

TRF Supporter

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