Asteroids - Science topic

Is it a colourized picture from the 1920s?

If it is a later picture, circa 1960s? then how is it possible that we have a "dead region"-- no trees, and an "alive region," within feet of each other? decades after the event?

Surely this is scientifically impossible? What could possibly be the cause?

And where is the crater?

And why did night turn to day around the world for weeks after?

And why were lights seen in the sky over Europa -before- the event according to some accounts?

And why are there genetic changes in this area?

What on earth is going on?

Cf. https://www.youtube.com/watch?v=oKHc0o5XhzU

(Some speculate, that after much too-ing and fro-ing, this was the moment Satan was finally thrown down to earth. The "light-bringer". This would also explain the dead-patch that lingers, and also the timing-- shortly after we had two World- Wars ; the killing fields of World War I, and the inhuman happenings of World War II).

I would like to do research with someone on the topic of the following asteroid deflection technique,

Based on the size, weight, distance, speed and composition of the desired asteroid, we can build a net of strong and flexible material bind them with rocket boosters and guide the asteroid to the desired path by changing its trajectory. this technique can also be useful for asteroid mining.

Pierpaolo Pergola proposed a mission to Cruthnie, a well known co-orbital asteroid of Earth, using a 2U CubeSat, could sprites be used to land on the asteroid? I think any probe mission that could launch sprites on independent targets of opportunity would extend utility in missions.  https://b612foundation.org/sentinel/ The Sentinal mission proposal would be an example of a mission that could benefit from such a capacity. Planetary Resources similarly could benefit from a cheap option to explore many asteroids cheaply. Even tagging passing small asteroids would be a useful capacity to have, to know where they are, a mineralogical analysis would require a larger sprite design I am guessing to improve capacity? 

1. Separator with a strong magnetic field can be used to separate Fe, Ni from other non-magnetic materials.

2. Pneumatic cyclone can serve as density or size separator(e.g., cyclone separator).

3. Laser mining and vacuum distillation:

First, concentrating sun light to create laser to melt the asteroid's crust into molten mass. This can help separate the relative low molten temperature metals(Fe, Ni, PGMs) with the nonmetals(Si).

Second, collect the molten mass or the fused solution into the vacuum distillation chamber.

Third, the temperature in the distillation chamber is slowly increased until a certain type of metal evaporates. The generation of "melt gas" will increase the chamber pressure and inhibits the distillation. Therefore A tube introduced to conducts the "pure gas" into a vacuum container for condensation and storage.

Thus far, the international community has not reached a consensus on the legality of unilateral commercial space mining activities and the approach to carrying out such activities. The unilateral commercial space mining regime as established in the domestic laws of the USA, Luxemburg, Japan, and the United Arab Emirates generates not only legal debate but also environmental concerns. operations on the surface of the moon could exacerbate lunar dust migration and loft dust onto the lunar orbits. Debris streams arising out of asteroid mining could threaten satellites in the orbits of the Moon and Earth, and asteroid mining will change the trajectories of asteroids and could lead to an Earth impact. Large-scale space mining could result in physical or chemical changes to regolith on celestial bodies which could not only adversely influence scientific investigation but also future human settlement. The issues could also arise regarding the possible spills and contamination arising out of the use of nuclear energy on celestial bodies, changes to landscape and ice deposits, and possible microbial contamination on some celestial bodies such as Mars. In the existence of legal uncertainty regarding space mining in the international community, do we need to formulate environmental ethics to guide space mining operations in the solar system? I finish a research article on this topic, Please refer to .

I found an excellent Wikipedia page titled List of Asteroid close approaches to Earth:

https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth

Looking at the table in the blue section there is identified an asteroid which will pass close to Earth on 26th June 2028. The size of the object is 610 to 1400m and it will pass within 0.65 of the distance to the moon. This table is clearly the result of an immense amount of work for which we should all be grateful.

It is important to find out the ultimate outcome of the trajectory of this asteroid. Will it ultimately hit the Earth or will it hit the moon and thus be no longer a threat? If we were to project forward the trajectory of this asteroid and the trajectory of the Earth and moon and found that in 1,000 years it will hit the Earth, is there anything we could do now to avoid this outcome? For example displacing the trajectory of the asteroid with rockets by even a tiny amount could over 1,000 years change the outcome so that it strikes the moon instead.

We would have to be sure that we had a really accurate identification of the current trajectory. Maybe precise observation from Earth and the JWST during its passage in 2028 would give an accurate enough reading.

It would also be worthwhile to make an honest assessment of the outcome of a direct impact by this object on Earth. Perhaps we should be making provision for the long term survival of the human species by preparing contingency plans for such an eventuality.

Richard

I would like to know how olivine is structured in asteroids.

With an ever-increasing number of known asteroids, it becomes more and more essential to have clear guidance on which objects to study first. To this purpose, estimating an asteroid "importance weight" might be helpful. However, while easy to say, it looks pretty complex to derive such a measure. Do you think this approach is feasible, and if so, what should this index include? Only research aspect or also the relevance of an asteroid from planetary defense and exploitation points of view? Please leave your comments here. Thanks.

I am wondering how extreme temperatures will affect asteroids whether it is a change in physical or chemical properties and possibly affecting the atomic structure?

The thought of mining asteroids have became more prominent throughout the last few years. So for the past month, I have been doing research on why water abstraction from asteroids would be helpful and how to do so. From what I know most of the asteroids near the earth, are olivine-rich. Other than its iron, (OH)- is available as well. Can't we can get water from (OH)- with my given research, through very high temperatures? This is just a thought and I am not a chemistry/physics expert but I would like to know if this is a possibility or if I am misunderstanding something that would make this impossible.

Is the future of humanity not on planets, but on or in space stations? Why go down deep gravity wells when the necessary resources exist in asteroids? Are we looking in the wrong place for extra-terrestrial intelligence (no down gravity wells, but between stars). Instead of trying to land on planets, we should be spending our research money to examining the asteroid belt.

it seems and we see most of the celstial bodies in the shape of a spherical shape ,

and also most in rotational axis and orbiting untill is slipped out like asteroids jump out

I don´t have much knowledge about rockets and my short internet research didn´t gave me insights. I´m thinking often about how we could use our solarsystem to reduce environmental problems on earth, for example to dispose our rubbish or take the resources from asteroids.

The basis to any of this ideas have to be greenhouse gas free rockets. What is our current situation and what are the outlooks in the future?

Let's imagine that you need to safely lower a spherical metal asteroid with a diameter of about ten meters to the surface of the Earth. What methods of braking objects of this size would be appropriate?

Chaos theory is a delightful contradiction - a science of predicting the behavior of "inherently unpredictable" systems. It is a mathematical toolkit that allows us to extract beautifully ordered structures from a sea of chaos - a window into the complex functioning of natural systems as diverse as the beating of the human heart and the trajectories of asteroids. So, how can this theory explain a crisis situation in general, and that of the Covid-19 pandemic in particular?

There are millions of asteroids in the solar system，asteroids and comets often pass through the earth at close range.There are some Threatening asteroids such as Bennu(101955).The threat is real for all of us ,when it comes,a so-called Gravity Tractor could maintain a position near the threatening asteroid, exerting a gentle tug that, over time, would deflect the asteroid.But I want to know if it can be done.

Hi Everyone,

I have a data set from NASA Jet Propulsion Laboratory for the "Diameters of the asteroids" that has fallen till now and from that I am trying to forecast future asteroids diameter through ML algorithms.

For this research I am not able to find many published papers. Can anyone guide me with this?

Thanks

I wanna study electric parameters in interplanetary space especially asteroid's belt for survey large scale electric structures in the solar system. I only know the Ulysses and it's data but it measured limited magnetic parameters. do you know better probes?

in other words, I must say that do you know how can understand the electrical effects of solarWinds in asteroid's belt?

The idea is to use a large asteroid and impact it again the desert to spread some powder at upper part of the atmosphere and create some shadow to lower Earth temperature some degrees.

Of course it could be done using a small rock to test it before.

ESA could make something useful again Climate Change instead of take measurements of it.

It cost is less to use a large asteroid than shut down all petrol or coal engines and could give some time for fusion and solar and wind generation

A gramophone gets music or the spoken word back from incised grooves in a disk. The grooves were made by vibrations laid down as sound in matter. Is it possible that Nature left its imprint in matter such as rock and metals (e.g. coins) that could be retrieved as sound from the past? For example, battles, impact of meteors and asteroids in the K/T boundary, 66 million years ago?

Are we nearing to climax of the Climate Change or the worst is yet to come? How fast the wind gusts could be in worst case scenario? How high the water level could be in case of strongest of the hurricanes? Do we need to revisit the hurricane categories? What could be the most disastrous for our planet Earth among the following:

1. Near-Earth Ojects (asteroids)

2. Earthquakes associated with Tsunamis

3. Climate Change

Asteroids - celestial electric power stations. What is your opinion?

Based upon the preponderance of evidence in recent decades, has anyone developed a new statistical model from which one could derive a return period based on the scale of the event?

 I need some new reference about it.

Astronomy

I am looking for literature on regional landscape patterns that look at the fractal quality of how rocks are broken apart in cosmic impacts, and the footprints they leave behind on the present landscape.  

Dear RGers,

We know that combination of several materials, such as metallic alloys, polymers or even some ceramics, with an aproppriate heat treatment, can provide shape memory effect.

We also know how big the Universe is. I mean, it's reaaally big.

So can we consider the possibility for a NATURAL MIXING of these "ingredients" as true?.

This object would need to deform to get the martensite state and would also need to get heated to get the austenite state, so...

Can we consider the gravity of other crossing by objects as a possible force to get the martensite state for this object? or the heat of a star as the trigger for the austenite state?

which one of these diagrams is correct ? (they are showing exactly the same time)

The more I read preparing that paper:

the more I realized the strange nature of D/1993 F2 (Shoemaker–Levy).

Anyone has a definite and sound answer with respect to the real nature of that object ?

Hello, As you can see in the picture, there is a dark ring on an asteroid, is it noise in the picture? or something else? totally it is like a ring not a burned pixel. 

If photometric opposition effect does not exist, but the polarimetric one shows up, does it mean these two phenomena are governed by different physical mechanisms?

Yes we have found small fragments, but the asteroid that hit the earth 65 million years ago was 10 kilometers... how do we not have physical evidence of this?

It seems that much of the data collected to date for 99942 Apophis is not present in the NASA PDS Small Bodies node. Is this impression accurate, and if so, why?

Physical tidal breakup of comets or asteroids .

The other day on the History Channel, it was said that the idea that an asteroid wiped out the dinosaurs millions of years ago was only just recently being seriously considered as possible. If anyone brought this idea up 25 years ago, it would've been scoffed at. This disturbed me, because I have only ever been told that this was scientific fact. I remember it presented this way as far back as 15 years ago. Is there someone who could explain if History Channel is correct?

Recent study performed by Wittke et al., who analyzed impact spherules, supports theory of cosmic impact 12,800 years ago. This event may be responsible for fundamental and very fast climate change, causing the extinction of most of the big animals over North America. This is an exciting theory, and, if correct, it may be very important also for our understanding of asteroid/comets impact threat. But, is there enough evidence to support this claim?

What evidence supports or refutes such an origin?

A new paper in press in MNRAS by C. de la Fuente Marcos and R. de la Fuente Marcos provides evidence on the existence of the Chelyabinsk cluster: http://arxiv.org/abs/1307.7918 . This cluster is just a complex of small asteroids and two relatively large members: 2007 BD7 and 2011 EO40. They conclude that the most probable parent body for the Chelyabinsk superbolide is the Near Earth Asteroid (NEA) 2011 EO40 and a close approach with a planet might have been producing the Chelyabinsk progenitor. In fact, the orbits of these NEOs are perturbed as they experience close encounters not only with the Earth-Moon system but also with Venus, Mars and Ceres. This dynamic mechanism that we previously envisioned is particularly efficient for rubble piles and explains the existence of meteoroid complexes (see e.g.: http://www.spmn.uji.es/ESP/articulo/2002NY40_MNRAS.pdf). Obviously this could produce spikes in the rate of impacts of small asteroids on Earth. Let's see if we have a good debate on this interesting issue.

I read a minute ago that companies plan to mine asteroids. This sounds great. I wonder, though, if somebody from those companies calculates by how much each asteroid's trajectory will change as a result of removing mass.