If you watched Greenland or not here is the trailer: https://www.youtube.com/watch?v=J43zOCT0Wy0

''John Garrity is a structural engineer living in Atlanta, Georgia, with his estranged wife, Allison, and their diabetic son, Nathan. He returns home to watch the near-earth passing of a recently-discovered interstellar comet named Clarke, with his family and neighbors...''

Some say 99942 Apophis will pass earth in March 2021 with possibile impact and that current pandemic is just a cover up for this event.

https://en.wikipedia.org/wiki/99942_Apophis

Hi all,

After browsing through all the asteroid data and stumbling on 2019 PG-1, I was going through other NEOs and obviously Apophis is the "big one" even though it is almost definitely going to miss. Consequently, I have two questions based on the data currently available.

https://en.wikipedia.org/wiki/99942_Apophis

1. Per Wikipedia, Apophis has been beyond observable range for a few years due to the sun. However, it was expected to return into view this month. Does anyone know if new observations have been taken and if not, when they may be taken?

QUOTE: As of January 2019, Apophis has not been observed since 2015, mostly because its orbit has kept it very near the Sun from the perspective of Earth. It has never been further than 60 degrees from the Sun since April 2014, and will remain so until December 2019. With the most recent 2015 observations, the April 12, 2068 impact probability is now 6.7 in a million (1 in 150,000), and the asteroid has a cumulative 9-in-a-million (1-in-110,000) chance of impacting Earth before 2106.

2. What are the chances that the 2029 approach could result in an unforeseen situation where the body crumbles and turns into "buckshot" due to Earth's gravity? As asteroids are generally clumpy and porous and Apophis does not appear to be solid metal, there is some possibility that as it approaches Earth, the planet's gravity results in a re-configuration of shape / mass. If the structure is bad enough it could break up entirely, if the structure is kinda meh, we could still see some fragments break off and enter the atmosphere. The current path also puts the body in the midst of many of our satellites.

So I guess the crux of my second question is, does anyone know what the makeup of Apophis is, and the probability / possibility of break-up and buckshot strike could be? I would think that even if it is guaranteed to miss in 2029, such a scenario would make a very stunning meteor shower very possible, on the "lowest impact" of potential impacts.

Thank you for enlightening my ignorance!

Since 99942 Apophis will be passing so close to Earth's orbit in 2029, why not take advantage of this unique opportunity to capture it as a satellite? Here are some advantages:

1. Placing 99942 in the L2 between the Earth and Moon would place it in an excellent position to be used as a tethering anchor for a future space elevator.

2. Its trajectory is close enough that the linear transformations describing both the finite-dimensional approximation to the solution of the differential equation measuring its projected trajectory and the spanning set of two ion-engine thrusters can be reasonably expected to be sparse.

3. L2 would be an excellent place to put a telescope, and with 99942's size, it could easily accommodate some sort of observatory. This would make it easier for manned missions to repair/overhaul/upgrade, as well as providing a more suitable laboratory than the ISS.

Obviously, this would be a monumental undertaking far exceeding anything our species has previously ventured. However, given the rarity of such opportunities, the mean value of which greatly dwarfs the average human lifespan, I believe the benefits vastly outweigh the risks. What think you; can it be done with the current technology? Should we attempt it?

EDIT 0: I am a mathematician currently finishing my first year of graduate school. I believe the control theory behind such an attempt would make an excellent thesis project.

99942 Apophis is a near-Earth asteroid that caused a brief period of concern in December 2004 because initial observations indicated a probability of up to 2.7% that it would hit Earth on April 13, 2029. Additional observations provided improved predictions that eliminated the possibility of an impact on Earth or the Moon in 2029. However, until 2006, a possibility remained that during the 2029 close encounter with Earth, Apophis would pass through a gravitational keyhole (A gravitational keyhole is a tiny region of space where a planet's gravity would alter the orbit of a passing asteroid such that the asteroid would collide with that planet on a given future orbital pass.) a small region no more than about 965 km (~600 mi) wide, that would set up a future impact exactly seven years later, on April 13, 2036. This possibility kept it at Level 1 on the Torino impact hazard scale until August 2006, when the probability that Apophis would pass through the keyhole was determined to be very small. By 2008, the keyhole had been determined to be less than 1 km wide. During the short time when it had been of greatest concern, Apophis set the record for highest rating on the Torino scale, reaching level 4. (The Torino Scale is a method for categorizing the impact hazard associated with near-Earth objects (NEOs) such as asteroids and comets.)

The diameter of Apophis is, as of the most recent 2013 observations, approximately 325 metres (1,066 ft). Preliminary observations by Goldstone radar in January 2013 effectively ruled out the possibility of an Earth impact by Apophis in 2036. By May 6, 2013 (April 15, 2013 observation arc), the probability of an impact on April 13, 2036 had been eliminated. As of October 8, 2014, using observations through February 26, 2014, the odds of an impact on April 12, 2068, as calculated by the JPL Sentry risk table is 1 in 149,000. Of objects not recently observed, there are about four asteroids with a more notable Palermo Technical Impact Hazard Scale than Apophis. On average, an asteroid the size of Apophis (325 meters) can be expected to impact Earth about every 80,000 years.

Preamble

With us having seen the images and the teaser of Tatsuya using Material Burst on an Asteroid or Comet, I wanted to share some info on current plans our world has now, and hopefully allow you guys to think of what a world without some capabilities would have as options.

I'm sure all of you will know that it is widely believed that an asteroid 66 million years ago lead to the extinction of many kinds of life on earth. This is still a threat to happen in the future as well. Hopefully our responses will be enough at that time.

What some of you may not know is that planetary defense scenarios have been devised in such a case that we detect a NEO object that would come within some range of the earth. The United States Congress in 2013 asked Nasa about such an event and what responses would be. The experts at the time had said that a from scratch mission would take about 5 years to intercept the NEO, with most efforts needing a year to even decades of warning. In 2018 the " National Near-Earth Object Preparedness Strategy Action Plan" was released.

In todays world many centers and organizations are mapping as many NEO's as possible. Nasa's main target being those that are 1kim in diameter and larger. Objects less than this size would still induce significant local or reginal damage, but unlikely to change the potential of the human race on a global scale. This effort, as stated previously is not just a United states effort, but a global one. For story relevance though the main groups to worry about would be Nasa, the B612 Foundation, and the Japanese Space Guard Association.

So lets say we find one that will collide, or come too close for comfort, what now? Well there are some strategies formulated now that can be divided into two types: Fragmentation and Delay. Fragmentation should be obvious: blow it up so the resulting damage is reduced significantly or removed all together. Delay is a little more complicated: Using various means change the trajectory of the object so that it no longer will be in danger of impacting the Earth.

Collison avoidance can also be seen as either direct or indirect in how they transfer energy to the object. Some direct methods are nuclear explosives and kinetic impactors. Some indirect methods would be gravity tractors or a system like attaching rockets or mass drivers to the object. Direct methods are preferred because they are faster and cost less. The method chosen would also be influenced by the characteristi

On April 17, 1945, Mussolini arrived in Milan. He was going to organize a resistance in Valtellina, north of Bergamo. On April 25, he held long talks with the leader of the Resistance, General Kadorna, and members of the KNOSI, Marazza and Lombardi. Mussolini wanted to remind that there are still German troops in the country, and was very upset to learn that the Germans have intentions to lay down their arms. Soon Mussolini and his associates headed for Lake Como in the Valtellina Valley. Arriving around 9 pm in the city of Como, they occupied the building of the local prefecture. In the morning, the small detachment moved along Lake Como to Musso, where the time machine was located in case of surrender. Marshal Graziani, fearing to fall into the hands of the partisans, preferred to surrender to the Americans. On the night of April 26-27, the fugitives joined a detachment of 200 Germans who were going to cross the border. A little later, Alessandro Pavolini and Clara Petacci met with them. At the village of Musso, the column was stopped by a partisan barrier. The partisan commander agreed to let the column pass, but only the Germans, demanding that they give up their Italian allies, who were following along with the column. A German lieutenant drove Mussolini, putting him in the uniform of a Luftwaffe non-commissioned officer and hiding him in the back of a truck. The partisans began to inspect the cars, but they did not find anyone. After that, Benito opened a secret bunker with a time machine and with other people (Clara Petacci, Alessandro Pavolini and his associates) set off on January 1, 2036.

The year 2036 is not much different from our time: The XXXVI Summer Olympic Games will be held; Russia is not politically stable, which is why some cities proclaim independence (Tambov, Chelyabinsk); the collision of the asteroid 99942 Apophis with the Earth; The termination of radio contact with the Voyager-2 interplanetary probe; The human flight to Mars; China will surpass the United States in gross domestic product; the widespread use of electric cars, electric buses and unmanned vehicles; the mass deployment of fifth-generation cellular networks (5G); The Starlink project begins to provide Internet access services via satellite connection; the fifth phase of the Marvel film universe; The release of the sequels of the film "Avatar"; The release of a TV series based on the works of Tolkien from Amazon Studios; the population has reached 8 billion; the popula