作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (2), pp.10ProQuest
摘要:By contrast, the highlands at the bottom (south end) of the Moon are chaotic with impact holes. [...]here and there, a crater like Archimedes (the biggest crater just to the upper leftof the Apennines) marks a recent impact. The scarcity of craters embedded in the smooth maria is...
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (3), pp.28-33ProQuest
摘要:[...]chocolate milk. Because most other elements readily merge with it and soak it up like a sponge, no celestial body has significant free oxygen. [...]nobody knew that air is a mix of gases. Because oxygen bonds so easily with most other elements, it makes up two-thirds of anim...
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (3), pp.10ProQuest
摘要:The weirdest thing that happened on the Moon was caused by Neil Armstrong disobeying his training. Result: The exterior ladder did not extend to the surface. [...]those first astronauts had to leap from the bottom rung. Eclipse expert Fred Espenak told me of a time in Africa when...
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (4), pp.10ProQuest
摘要:Start with Galileo. Since no one had pointed a telescope at the sky before, he was bound to get surprises. The 1967 discovery of the first neutron star revealed a sun smaller than Hawaii, whose material is so dense that each speck equals a cruise ship crushed down to the size of ...
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (6), pp.8ProQuest
摘要:A supernova is nine orders of magnitude brighter, but we'll never see one up close, because no star in our region of the galaxy is massive enough to pop. By the time the light spreads out and gets here, each square meter of Earth's surface (the size of a wall poster) is illuminat...
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (5), pp.8ProQuest
摘要:Happily, lots of distant galaxies lie in that direction, like the edgewise beauty NGC 4565 and the scarily massive ball-shaped M87. Sure enough, they form a wide, low band running from near Sirius through Orion and into Auriga, which marks the direction opposite the galaxy's cent...
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (7), pp.6ProQuest
摘要:Mike, as the device was known, held supercold liquid deuterium (hydrogen's heavier cousin) for fuel and a fission bomb to light the fuse. Yet even the Sun's fusion process converts only 0.7 percent of its four hydrogen atoms' mass into energy, leaving the rest behind mostly as di...
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (8), pp.6ProQuest
摘要:[...]we've known for a long time that the Sun's warmth and an object's colors occur strictly within our minds. [...]they form an inadequate framework for modeling the universe. Since standard explanations leave us in a murky place, it may be time for a revision.
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (10), pp.9ProQuest
摘要:[...]astrophysicists discovering a hazardous incoming body would quickly blab it all over the place.) Is the fascination with space dangers farfetched? [...]recently, we'd point out that only one person has ever been harmed by a celestial body. Since 2000, astronomers have improv...
作者:Bob Berman
来源:[J].Astronomy, 2016, Vol.44 (9), pp.8ProQuest
摘要:[...]do those stars show any brightness difference when Lambda shines at full light? Because then, Lambda beats Gamma by only one-third of a magnitude. Can you tell specifics about each, like its altitude (the slower it is, the higher up), whether it's still functioning (the answ...


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