Questions tagged [impact]

Questions regarding the collision of one thing with another

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0answers
30 views

Are there any equations out there that can calculate the burnup of an asteroid depending on angle?

Are there any equations that can calculate the burnup of an asteroid depending on the angle? I want to be able to calculate the magnitude of an asteroid impact with the angle being the changeable ...
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1answer
911 views

How many satellites can stay in a Lagrange point?

Lagrange points as I understand it are points in space between 2 objects where the gravitational pull between them is effectively equal. That makes station keeping at these points relatively easy. ...
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1answer
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Is deformation of the impact attenuation system visible on the surviving Apollo command modules?

As pointed out in this question, the Apollo command module had crushable ribs along one edge of the base of the cone, and crushable struts that suspended the crew couches inside the vehicle. I've ...
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2answers
133 views

Do the velocities of orbital debris have a bias in the direction of Earth's rotation?

Most spacecraft are launched and orbit prograde -- in the same direction that the Earth rotates -- to give a "speed boost" to get to orbital velocity. One would therefore expect that the trajectories ...
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1answer
87 views

How did fictional asteroid 2019 PDC get its name?

Gizmodo's NASA and FEMA Will Simulate an Impending Asteroid Strike Next Week The hypothetical discovery takes place in 2019, but what does "PDC" stand for? Perhaps it is another "discovery" by the ...
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138 views

Why does this satellite collision debris field look like a big “X”?

This answer to the question Whats the protocol if two satellites collide? shows the image below, and I don't understand the shape. I would have expected two "jets" of debris, each projecting roughly ...
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1answer
87 views

Could a satellite in GEO-orbit make an evasive maneuver to avoid an anti-satellite impactor?

Communication satellites orbit at an altitude a couple of hundred times above the satellite that the Indian government recently shot down. Also GPS-satellites are about one hundred times further up ...
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What are the chances a space probe will make it to another star without hitting a bit of space dust?

tl;dr: What is the density of "space dust" or micrometeorites in interstellar space, and how likely is it that a tiny interstellar craft could avoid hitting any? In a future time we will likely ...
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9answers
25k views

A starship is travelling at 0.9c and collides with a small rock. Will it leave a clean hole through, or will more happen?

Say there is a football sized rock in the path of the ship. Will it create a football sized hole through the ship in the blink of an eye, or will more happen? The ship would be filled with metal, ...
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1answer
130 views

Highest velocity impact between a spacecraft and a solar system body? What about for a dedicated impactor (spacecraft component)?

In this answer I mention the proposed impact of DART: Double Asteroid Redirection Test (DART) Mission Double Asteroid Redirection Test The Double Asteroid Redirection Test (DART) Element of the ...
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Use of thrusters for Collision Avoidance Maneuver

I'm building an orbit propagator that gives the position of two satellites at time T. The position are expressed in ECI and after that are being transformed in LVLH frame (as mentioned ECI to LVLH ...
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1answer
239 views

Asteroid impact on the Moon: which effects cause the flash?

It is most likely that there was an impact on the Moon during yesterday's lunar eclipse. I am trying to get some more understanding of this so that I could maybe do a more detailed video on this ...
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1answer
4k views

If a Voyager crashes into something, would we know?

A recent question asked about the feasibility of using Voyager 2 to detect objects in the Oort cloud. The answers indicate, among other issues, the instruments on-board the Voyagers would likely be ...
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1answer
196 views

What prevents all these man-made objects flying in space from colliding with each other?

Does NASA know the location of every object in orbit and they calculate satellite and shuttle launches around not hitting these objects or are they just rolling the dice that the probability of ...
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3answers
128 views

Feasible way to detect masses without natural light in deep space?

While I was perusing the entries here on energy sources for interstellar travel, it occurred to me that a problem accompanying a low energy density in space distant from stars is darkness. Is there a ...
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Do we have a photo of a micrometeorite impact on a lens?

Micrometeorite and debris impacts on orbital spacecraft pose a threat to systems and crew. For example, a high velocity impact caused this chip in the International Space Station's Cupola. The ISS ...
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1answer
102 views

How is stability of Geosynchronous Orbits (GSO) affected by Earth’s mass?

I'm researching stable orbits slightly beyond GSO and I need to find out how close to GSO I could place an object without risking collision. If the Earth was homogeneous the altitude should be the ...
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1answer
245 views

What just happened? What does this satellite breakup announcement mean? What does it suggest?

I logged into Space-Track and immediately saw this message: The 18th Space Control Squadron has confirmed the breakup of SL-12 R/B(AUX MOTOR), #36407. The time of breakup was at approximately 0206z,...
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What information exactly was necessary to determine and announce this “debris causing event”?

A 1:53 PM - 19 Jul 2016 tweet from the twitter account @18SPCS said: 19 Jul: JSpOC ID’d debris causing event related to @DigitalGlobe WorldView-2; 8 debris pieces but WV2 confirmed operational &...
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1answer
952 views

Is Starman/Roadster in any danger in the asteroid belt?

Elon tweeted that Starman's trajectory is going to overshoot Mar's orbit and bring it close to the asteroid belt. Does this mean that Starman is in danger of being crushed by an asteroid??
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Is the SpaceX Falcon Heavy payload (a Tesla car) space junk?

Yesterday SpaceX succeeded in the first Falcon Heavy launch, but the payload, a Tesla car has no real useful purpose (except for company prestige). Thus, can it be considered as space junk ? How long ...
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1answer
208 views

How predictable is one asteroid's trajectory?

If one fictitious probe mission was to impact an asteroid fast enough to destroy it using its kinetic energy, could the asteroid's trajectory be predicted accurately enough (plumes or emanations or ...
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427 views

How can debris from an impact escape to a stable orbit?

Please help me understand: As far as I understand it, when an object gets thrown off the surface of a planet by an impact and doesn't reach escape velocity it is on a suborbital trajectory and ...
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How might one approach using AI (convolutional neural network) to predict collisions in orbit?

CNN's Tomorrow's Hero profile Meet Amber Yang. She's trying to prevent a space debris catastrophe describes an investigation into the use of a convolutional neural network (CNN) to predict possible ...
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How deep a crater could an impactor spacecraft cause on Mars?

What would the best way be to crash an impactor into Mars with greatest topological effect? And how deep a crater could it excavate? Mars missions to date have been designed to approach the planet at ...
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What is the typical relative impact velocity of orbital debris in low Earth orbit?

We all know that space is about going really fast. We also know that what matters in a collision isn't really absolute speed, but relative velocity. (Two cars with matched speeds on a highway touching ...
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1answer
381 views

Which two satellites had a 44% probability of collision at 2017-01-07 21:53 UTC?

I saw this message on space-track.org: The JSpOC has identified a close approach between two non-maneuverable satellites in a sun-synchronous orbit (approximately 800km altitude) with a time of ...
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Can a nuclear detonation on Moon destroy life on Earth?

If a nuclear weapon is detonated on the moon it would launch debris into space. The debris would then fall to earth like asteroids. Would this impact wipe out life on Earth? In other words, are our ...
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338 views

Would the one million people on Mars be killed by an impact equivalent to an Extinction Level Event on Earth

If there are cities on Mars in the second half of this century with say a million people, they will be living in engineered structures and sustained by agriculture in protected, controlled ...
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Impact shielding and damage control of a manned Interplanetary spacecraft [closed]

We've all seen pictures of micrometeorite and debris damage, and we've all heard the wisdom that at orbital speeds a paint chip is more lethal than a rifle round. We also know that having holes ...
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1answer
99 views

Where to read about early work in the detection of dust impacts on solar observing spacecraft?

I've read in a side note included in this nice answer that : Fun Side Note: The FIELDS instrument is planning to look for dust by detecting the electric field pulses resulting from the plasma ...
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2answers
226 views

Will LAGEOS burn up or be destroyed on impact?

The LAGEOS satellites have plaques that try to explain what they are without using any words or decimal numbers or similar 'current' concepts. To me, this suggests we expect the satellites to last ...
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681 views

What happens to a spacecraft crashing into the Moon?

When planning a new architecture for lunar missions, one always faces the potential of nuclear thermal engines. Having a much higher $I_{sp}$, they offer a much higher propellant efficiency, causing a ...
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Iridum-Cosmos post-collision vectors

I've been looking at this article. This question is about the motion of fragments in the immediate aftermath of the collision. I've drawn the following figures and quotes from the link. Figure 9 ...
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1answer
252 views

Understanding gravitational keyhole analysis for Near-Earth Objects

I've been studying the resonant return and gravitational keyhole analysis for NEOs and using the extension of Öpik's theory of close encounters (aka Öpik-Valsecchi theory, Valsecchi et al., Astron ...
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1answer
7k views

What impact would a pea size meteor have when it hits the ground?

If a meteorite the size of a pea landed on the road in front of you, what sort of impact would it have? How big would it have been when it entered the atmosphere and would it have been visible during ...
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2answers
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Planet building: collision without fragmentation?

Our Solar system poses a significant problem for colonisation insofar that the rocky planets are predominantly on the... small scale; at least as far as mass is concerned (Earth is the exception ...
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1answer
431 views

What would happen if an object larger than Jupiter hit Jupiter?

What would happen if a large non-gaseous body, equal to or greater than that of Jupiter hits with Jupiter? My assumption is the larger body (name it as A) will have a large gravity and a large mass ...
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3answers
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What would happen if an Earth-sized body encountered Jupiter?

As we all know Jupiter is a gaseous planet so what would happen if an Earth-sized object happened to encounter Jupiter? Would Jupiter engulf the object and make it stay at Jupiter's core? Would the ...
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241 views

Why does the Moon's Anaxagoras crater seem sort of jumbled?

Now that very high resolution imagery of the Moon's whole north, above 60oN, can be viewed on one giant awesome zoomable map, I've been taking a close look at a number of craters. Anaxagoras sticks ...
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Would a kinetic impact “cloud” avoid fragmenting an asteroid to be deflected?

A problem with using a traditional kinetic impactor in one piece, like the one used by Deep Impact, to deflect a hazardous NEA, is that its effects depend on the subsurface composition of the asteroid....
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625 views

Could we deal with an asteroid threat given current technology?

If we discovered a sizeable (Tunguska-like mass or larger) near-earth object tomorrow that was on a definite collision course with Earth in the near future, could we deal with it with our current ...
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2answers
818 views

Extinction asteroid (10-100 km) impact avoidance

With the present "state-of-the-art" of space technology what is possible to do to avoid an Earth impact by rocky bodies 10 km to 100 km in diameter? Is there any international project to develop a ...
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Playing football in microgravity: is it hazardous for instruments?

In video documents where astronauts are in micro-gravity, we often see them moving objects without paying attention for the nearby instruments or buttons panels (either aboard spacecrafts or aboard ...
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1k views

Is it (or why is it) worse to break up a asteroid on a collision course with Earth?

It is quite common to find (pseudo?) scientific statements to the effect that blowing up asteroids which are heading our way is a very bad idea, and that the movie Armageddon got this point totally ...
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1answer
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Aren't the mirrors of the James Webb Space Telescope too unprotected?

I've looked at the design of the James Webb Space Telescope and I got curious about something, some years ago, it seems that the international space station was hit by micro-meteorites. I'm wondering ...
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Is there a meteorite from Earth on Mars?

No body is immune to impact by other bodies. Earth too is no stranger to body-play; Micro-micro meteorites accumulate by the giga-ton annually in the form of dust. Larger impact bodies such as the ...
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1answer
3k views

Could a gun fired inside the ISS rupture it?

We know there is at least one gun in the ISS the caliber seems to a state secret. According to Wikipedia and NASA large pdf there are over 100 shield configurations on the ISS. These would be ...
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822 views

Do meteor showers from 209P/LINEAR cometary debris pose a threat to the ISS and other Earth-orbiting satellites?

This is a somewhat similar question to What risk management options are available for Mars orbiters and rovers to mitigate threat of impacting with Siding Spring cometary debris?, only this time much ...
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1answer
435 views

How many space craft have been intentionally crashed through 2014?

A couple of comments on the question Has there been any mission to land on a planet or moon in the Outer Solar System? suggesting that there is no scientific benefit to a crash on a moon, reminded me ...