The Instability

ISAAC ASIMOV
Gold, The Final Science Fiction Collection
Part One - The Final Stories

The Instability
Typed by Bateau


Professor Firebrenner had explained it carefully. "Time-perception depends
on the structure of the Universe. When the Universe is expanding, we
experience time as going forward; when it is contracting, we experience it
going backward. If we could somehow force the Universe to be in stasis,
neither expanding nor contracting, time would stand still."
"But you can't put the Universe in stasis," said Mr. Atkins, fascinated.
"I can put a little portion of the Universe in stasis, however." said the
professor. "Just enough to hold a ship. Time will stand still and we can move
forward or backward at will and the entire trip will last less than an instant.
But all the parts of the Universe will move while we stand still, while we are
nailed to the fabric of the Universe. The Earth moves about the Sun, the Sun
moves about the core of the Galaxy, the Galaxy moves about some center of
gravity, _all_ the galaxies move.
"I calculated those motions and I find that 27.5 million years in the future, a
red dwarf star will occupy the position our Sun does now. If we go 27.5
million years into the future, in less than an instant that red dwarf star will be
near our spaceship and we can come home after studying it a bit."
Atkins said, "Can that be done?"
"I've sent experimental animals through time, but I can't make them
automatically return. If you and I go, we can then manipulate the controls so
that we can return."
"And you want me along?"
"Of course. There should be two. Two people would be more easily believed
than one alone. Come, it will be an incredible adventure."
Atkins inspected the ship. It was a 2217 Glennfusion model and looked
beautiful.
"Suppose," he said, "that it lands _inside_ the red dwarf star."
"It won't," said the professor, "but if it does, that's the chance we take."
"But when we get back, the Sun and the Earth will have moved on. We'll be in
space."
"Of course, but how far can the Sun and Earth move in the few hours it will
take us to observe the star? With this ship we will catch up to our beloved
planet. Are you ready, Mr. Atkins?"
"Ready," sighed Atkins.
Professor Firebrenner made the necessary adjustments and nailed the ship to
the fabric of the Universe while 27.5 million years passed. And then, in less
than a flash, time began to move forard again in the usual way, and
everything in the Universe moved forward with it.
Through the viewing port of their ship, Professor Firebrenner and Mr. Atkins
could see the small orb of the red dwarf star.
The professor smiled. "You and I, Atkins," he said, "Are the first ever to see,
close at hand, any star other than our own Sun."
They remained two-and-a-half hours during which they photographed the
star and its spectrum and as many neighbouring stars as they could, made
spcial coronagraphic observations, tested the chemical composition of the
interstellar gas, and then Professor Firebrenner said, rather reluctantly, "I
think we had better go home now."
Again the controls were adjusted and the ship was nailed to the fabric of the
Universe. They went 27.5 million years into the past, and in less than a flash,
they were back where they started.
Space was black. There was nothing. Atkins said, "what happened? Where are
the Earth and Sun?"
The professor frowned. He said, "Going _back_ in time must be different. The
entire Universe must have moved."
"where could it move?"
"I don't know. Other objects shift position within the Universe, but the
Universe as a whole must move in an upper dimensional direction. We are
here in the absolute vacuum, in primeval Chaos."
"But _we're_ here. It's not primeval Chaos anymore."
"Exactly. That means we've introduced and instability at this place where we
exist, and _that_ means--"
Even as he said this, a Big Bang obliterated them. A new Universe came into
being and began to expand.