«EARTH-GRAZER»に関連する英語の本
以下の図書目録から
earth-grazerの使いかたを見つけましょう。
earth-grazerに関する本と英語文献で使われた文脈を提供するための簡単な抜粋文。
1
Atlas of Astronomical Discoveries
Earth. Target. Earth. David. Tholen. and. his. Colleagues. Discover. the. Earth-
Grazer. Apophis. More than a thousand asteroids, more than a kilometer across,
are estimated to move through the inner solar system. In theory, these ...
2
Meteors and How to Observe Them: Secondary plant products. ...
Occasionally a Geminid Earth-grazer will pass higher in the sky and will often be
the highlight of the night. Many of the Geminid meteors seen are bright and
colorful. Several each night can fall into the fireball category, which is magnitude
–5 ...
3
The Hunt for Planet X: New Worlds and the Fate of Pluto
He was one of the discoverers of Apophis, the 'most dangerous' Earth-grazer
identified to date. Such a small object – Apophis is estimated to have a diameter
of 300–400 meters – can be detected because it leaves a faint trail of light on a ...
dust lane | earth grazer i dust lane a lane of dark interstellar dust in a galaxy or
emission nebula. Dust lanes obscure light. i dwarf star relatively small stars, up to
20 times larger than the Sun and up to 20,000 times brighter. Sun is a dwarf star. i
...
5
The Observer's Guide to Astronomy:
'Earth-grazer' is not always synonymous with 'Earth-crosser', and so on. Such
subtleties appear unwarranted. The designation Aten-Apollo-Amor has the
advantage of being the most generalized. To date, some one hundred A-A-A
objects ...
6
Distant Worlds: Milestones in Planetary Exploration
Less than 10 m (33 ft) across, the Earth-grazer posed no real threat, since it
would probably have exploded at high altitude if it had been on a collision course
with our planet. However, there are thought to be around 1,000 near-Earth
asteroids ...
7
Seven Wonders of Asteroids, Comets, and Meteors
Among the thousands of asteroids it has discovered, about ninety-five fall in the
near-Earth object, or Earth-grazer, category. This means they can approach
within 30 million miles (48 million km) of our planet. But there's no need to fear a
...
8
The Wandering Astronomer
But in fact it is not a real "Earth-grazer", because its orbit is inclined at the high
angle of 22 degrees, and there is no immediate fear of a collision. (The same is
true of Phaethon.) The orbital period of Icarus is 409 days. Obviously we can see
no ...
... over 93 000 000 miles. This value has now been superseded, however, by
more accurate determinations made by other methods. Betula is not an "Earth-
grazer", but, like Eros, it is well worth studying, since it too may be used to
determine ...
10
The Planet Observer's Handbook
It is not an Earth grazer as it cannot approach Earth nearer than one half of this
distance. Its uniqueness lies in the fact that at its perihelion it is only 18 million
miles (29.0 million km) distant from the sun which is closer than Mercury.
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Photos: See Five Fireballs That Lit Up Colorado Skies
Subsequent reports suggested that the object was probably an earth-grazer meteorite — and this kind of thing actually happens fairly often in ... «Westword, 3月 15»
Leonid Meteors Get Caught on Camera, But It Wasn't Easy
"The hope was to capture a really bright 'Earth-grazer' meteor from the Leonids — this is a meteor coming at us at a low angle to the horizon ... «NBCNews.com, 11月 14»
It's space WAR: Comet launches fireballs at space-invading EARTH
... is not a comet to be trifled with; it is renowned for spewing two types of stuff to burn up in our atmosphere: fireballs and Earth-grazer meteors. «Register, 11月 14»
UFOs Captured By Canadian News Crew During Forest Fire …
"It is an Earth-grazer, a meteor that approaches the atmosphere at a shallow angle, and continues on, skipping off the atmosphere back into ... «Headlines & Global News, 8月 14»
NASA: That meteor that broke up over North Texas Saturday night …
“That was a bright fireball we call an Earth-grazer,” says Bill Cooke, head of NASA's Meteoroid Environment Office in Huntsville, Alabama. «Dallas Morning News, 7月 14»
Leonid Meteor Shower Peaks on Thursday
The meteors probably won't start to appear across eastern North America until after midnight, though we may catch an occasional Earth-grazer ... «Space.com, 11月 11»
Obama's Strategy to Kill the Space Program
This is assuming that there is an earth-grazer asteroid (an "Apollo-Amor object," in technical parlance) in the neighborhood at the time, ... «American Thinker, 7月 11»
The Leonid Meteor Shower Peaks Wednesday: Tips for Skywatching
... at around 11 p.m. and in the hour or two thereafter ? as the Sickle of Leo rises ? is the time with the most promise of seeing an "Earth-grazer.". «Space.com, 11月 10»
