File:SmallAsteroidImpacts-Frequency-Bolide-20141114-ar.jpg
SmallAsteroidImpacts-Frequency-Bolide-20141114-ar.jpg (800 × 560 pixels, file size: 236 KB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionSmallAsteroidImpacts-Frequency-Bolide-20141114-ar.jpg |
العربية: أحدث الشُهب والكويكبات الصَغيرة التي تتفكك في الغلاف الجَوي للأرض
English: New Map Shows Frequency of Small Asteroid Impacts, Provides Clues on Larger Asteroid Population
This diagram maps the data gathered from 1994-2013 on small asteroids impacting Earth's atmosphere IMAGE: This diagram maps the data gathered from 1994-2013 on small asteroids impacting Earth's atmosphere to create very bright meteors, technically called "bolides" and commonly referred to as "fireballs". Sizes of red dots (daytime impacts) and blue dots (nighttime impacts) are proportional to the optical radiated energy of impacts measured in billions of Joules (GJ) of energy, and show the location of impacts from objects about 1 meter (3 feet) to almost 20 meters (60 feet) in size. DESCRIPTION: A map released today by NASA's Near Earth Object (NEO) Program reveals that small asteroids frequently enter and disintegrate in the Earth's atmosphere with random distribution around the globe. Released to the scientific community, the map visualizes data gathered by U.S. government sensors from 1994 to 2013. The data indicate that Earth's atmosphere was impacted by small asteroids, resulting in a bolide (or fireball), on 556 separate occasions in a 20-year period. Almost all asteroids of this size disintegrate in the atmosphere and are usually harmless. The notable exception was the Chelyabinsk event which was the largest asteroid to hit Earth in this period. The new data could help scientists better refine estimates of the distribution of the sizes of NEOs including larger ones that could pose a danger to Earth. Finding and characterizing hazardous asteroids to protect our home planet is a high priority for NASA. It is one of the reasons NASA has increased by a factor of 10 investments in asteroid detection, characterization and mitigation activities over the last five years. In addition, NASA has aggressively developed strategies and plans with its partners in the U.S. and abroad to detect, track and characterize NEOs. These activities also will help identify NEOs that might pose a risk of Earth impact, and further help inform developing options for planetary defense. The public can help participate in the hunt for potentially hazardous Near Earth Objects through the Asteroid Grand Challenge, which aims to create a plan to find all asteroid threats to human populations and know what to do about them. NASA is also pursuing an Asteroid Redirect Mission (ARM) which will identify, redirect and send astronauts to explore an asteroid. Among its many exploration goals, the mission could demonstrate basic planetary defense techniques for asteroid deflection. |
Date | |
Source | Derivative from this file |
Author |
|
Other versions | English |
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Translated to Arabic - عُرِبَت. The original can be viewed here: SmallAsteroidImpacts-Frequency-Bolide-20141114.jpg: . Modifications made by علاء.
|
Licensing
[edit]Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
Warnings:
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 22:51, 20 November 2015 | 800 × 560 (236 KB) | علاء (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on ar.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
JPEG file comment | File source: http://commons.wikimedia.org/wiki/File:SmallAsteroidImpacts-Frequency-Bolide-20141114.jpg |
---|