"Greg Egan - The Planck Drive" - читать интересную книгу автора (Egan Greg)

take you a moment to spot it; it looks about the same as
the new moon from Earth." SheтАЩd chosen their
coordinates and velocity carefully; as she spoke, a bright
star split in two, then flared for a moment into a small,
perfect ring as it passed directly behind the hole. "Apart
from gravitational lensing, of course."

Cordelia smiled, obviously delighted. "Is this a real view?"

"Partly. ItтАЩs based on all the images weтАЩve received so far
from a whole swarm of probesтАУbut there are still
viewpoints that have never been covered, and need to be
interpolated. That includes the fact that weтАЩre almost
certainly moving with a different velocity than any probe
that passed through the same locationтАУso weтАЩre seeing
things differently, with different Doppler shifts and
aberration."

Cordelia absorbed this with no sign of disappointment.
"Can we go closer?"

"As close as you like."


file:///G|/rah/Greg%20Egan/Egan,%20Greg%20-%20The%20Planck%20Dive.htm (7 of 36) [2/2/2004 2:01:04 AM]
Asimov's - The Planck Dive


Gisela sent control tags to the platform, and they spiraled
in. For a while it looked as if thereтАЩd be nothing more to
see; the featureless black disk ahead of them grew
steadily larger, but it clearly wasnтАЩt going to blossom with
any kind of detail. Gradually, though, a congested halo of
lensed images began to form around it, and you didnтАЩt
need the flash of an Einstein ring to see that light was
behaving strangely.

"How far away are we now?"

"About thirty-four M." Cordelia looked uncertain. Gisela
added, "Six hundred kilometersтАУbut if you convert mass
into distance in the natural way, thatтАЩs thirty-four times
ChandrasekharтАЩs mass. ItтАЩs a useful convention; if a hole
has no charge or angular momentum, its mass sets the
scale for all the geometry: the event horizon is always at
two M, light forms circular orbits at three M, and so on."
She conjured up a spacetime map of the region outside
the hole, and instructed the scape to record the
platformтАЩs world line on it. "Actual distances traveled
depend on the path you take, but if you think of the hole