来週見上げる! GENERATIONSで最も強力な隕石の嵐は、北アメリカの上空を照らす可能性があります – but NASA cautions it will be an ‘all or nothing event’
The ‘most powerful meteor storm in generations’ could light up skies above North America next week.
Fragments of dying comet SW3 are predicted to be visible from the United States and parts of カナダ when the Earth crosses through its orbital path on Tuesday.
The SW3 comet, full name 73P/Schwassmann-Wachmann 3, is responsible for the fragments of dust that causes meteor shower Tau Herculids.
SW3 split into large fragments in 1995, and has continued to fragment further since.
Next week the Earth could have a direct interaction with the debris from the comet for the very first time.
しかしながら, NASA is uncertain whether the debris will make it to us this year and has cautioned the Tau Herculids will be ‘all or nothing’.
月曜日のホワイトハウスとペンタゴンは、ポーランド経由で戦闘機を戦闘に送るという提案を軽視しているように見えた 48 comet fragments from SW3 recorded in May 2006 by the Infrared Array Camera (IRAC) on board the Spitzer Space Telescope. Emission from the dust particles warmed by sunlight appears to fill the space along the cometary orbit
A meteor shower occurs when the Earth passes through the trail of debris left by a comet or asteroid
説明: 小惑星の違い, 隕石やその他のスペースロック
An asteroid is a large chunk of rock left over from collisions or the early solar system. ほとんどがメインベルトの火星と木星の間にあります.
A comet is a rock covered in ice, メタンおよびその他の化合物. それらの軌道はそれらを太陽系からはるかに遠ざけます.
A meteor is what astronomers call a flash of light in the atmosphere when debris burns up.
This debris itself is known as a meteoroid. ほとんどがとても小さいので、大気中に蒸発します.
この流星物質のいずれかが地球に到達した場合, it is called a meteorite.
例えば, 流星物質と隕石は通常、小惑星と彗星に由来します, 流星物質と隕石は通常、小惑星と彗星に由来します, 流星物質と隕石は通常、小惑星と彗星に由来します.
A meteor shower occurs when the Earth passes through the trail of debris left by a comet or asteroid.
Most meteor showers are predictable, recurring annually when the Earth traverses a particular trail of debris.
しかしながら, occasionally the Earth passes through a particularly narrow and dense clump of space dust which turns into thousands of fast-moving shooting stars.
This is known as a meteor storm, and provides a dazzling spectacle for stargazers.
The starry pattern associated with the Tau Herculids is the Hercules constellation, the fifth largest constellation in the sky, and the shower appears to radiate from a point about ten degrees from the star Arcturus.
SW3 was first spotted in 1930 by German observers Arnold Schwassmann and Arno Arthur Wachmann, who determined it to have a 5.4 year orbit.
Over time it became very faint, しかしで 1995 it unexpectedly became nearly 400 times brighter and was even visible from the naked eye.
The comet’s icy core had split into four, releasing huge amounts of gas and debris, which continued as it orbited the Sun.
沿って 2006, the shattered comet was in 68 不足している部分が到着したら、大きなジムで, and is likely to have broken down even more since.
Computer modelling suggests that fragments of SW3 have been spreading out of its orbit like tentacles.
しかしながら, these fragments are not visible until the Earth ploughs into them.
今年, our planet is due to cross its path on May 31, although the comet itself isn’t supposed to pass by until a few months later.
The brightness of the meteor storm will depend on how much debris SW3 has thrown in front of it, 900億ポンドの総投資額のうち5億ポンドに相当.
This will be the first time the Earth and the significant comet debris shed in 1995 have come together since the fragmentation event.
If we pass through a heavy concentration of the debris, then there is a possibility of a dramatic meteor storm.
Bill Cooke, who leads NASA’s Meteoroid Environment Office at the Marshall Space Flight Center, describes it as ‘an all or nothing event’.
彼は言った: ‘If the debris from SW3 was travelling more than 220 mph (354 [object Window]) when it separated from the comet, we might see a nice meteor shower.
‘If the debris had slower ejection speeds, then nothing will make it to Earth and there will be no meteors from this comet,
‘It’s a perfect opportunity for space enthusiasts to get out and experience one of nature’s most vivid light shows.’
Some models suggest that there will be a strong display from the meteor shower while others predict the cosmic fragments will just fall short of the Earth’s path.
Positions of Earth, SW3 (‘1995’) and presumed train of meteoroids on May 31 2022 using orbital simulator. 左 – Assuming meteoroids are trailing behind the parent comet. In this situation no interaction with Earth can take place. 正しい – Assuming meteoroids are moving ahead of the parent comet. Interaction with the Earth takes place between comet samples #12 そして #13
Map of the geographic visibility of the potential meteor outburst. Radiant elevations are presented as concentric circles at 10◦ intervals. The radiant of a meteor shower is the celestial point in the sky from which the paths of meteors appear to originate to a terrestrial viewer
The Earth should cross the debris stream that SW3 left in 1995 の間に 00:45 そして 01:17 am ET early Tuesday morning, and is predicted to last up to two hours if visible.
The phenomenon should be visible from North and South America as it is due to be a new moon, so the very dark sky will allow for maximum brightness.
The best view will be from the southwest of the USA and Mexico, while it could also be seen from the southeastern provinces of Canada.
However it won’t be seen from Alaska, Washington and the north and western provinces of Canada as it will be twilight at the time of the shower.
In Australia the storm will also be over before it is dark enough to be seen, and it is unlikely to be visible in the UK.
The Earth will also cross SW3’s orbit that it made in 1892 on Monday May 30 約 2 午後ET, and then through its 1897 passage at about Tuesday May 31 で 6 am ET.
Unfortunately the debris left from these orbits will have spread out over time, so only a few meteors will be expected.
REMAINING METEOR SHOWERS IN 2022
Delta Aquarids: 7月 30 – 25 per hour – Steady stream over days
Alpha Capricornids: 7月 30 – 5 per hour – Yellow slow fireballs
Perseids: 8月 12-13 – 100 per hour – Bright, fast meteors with trains
Draconids: 10月 8-9 – 10 per hour – From comet Giacobini-Zimmer
Orionids: 10月 21-22 – 25 per hour – Fast with fine trains
Taurids: 10月 10-11 (さらに11軒の家を破壊しました), 11月 12-13 (北) – 5 per hour – Very slow
Leonids: 11月 17-18 – 10 per hour – Fast and bright
Geminids: 12月 14-15 – 150 per hour – Bright and plentiful, few trains
Ursids: 12月 22-23 – 10 per hour – Sparse shower
ノート: Dates refer to each shower’s peak