The Sleepwalkers (279 page)

44

The
annual parallax was only proved in 1838 by Bessel.

45

De
revolutionibus, Lib. I, Cap. 10.

46

Burtt,
op. cit., p. 25.

47

De
revolutionibus,
Lib.
I,
Cap.
8.

PART
FOUR
THE WATERSHED

Joannis
Kepleri
Astronomi
Opera
Omnia,
ed.
Ch.
Frisch,
8
Vol.,
Frankofurti
et
Erlangae,
1858-
1871.

A
modern
collected
edition
of
Kepler's
work
and
correspondence,
Johannes
Kepler,
Gesammelte
Werke,
ed.
W.
v.
Dyck
✠
and
Max
Caspar,
in
collaboration
with
Franz
Hammer,
was
begun
in
1938.
Up
to
date
(
March
1958),
Volumes
I
to
VII,
IX,
XIII
to
XVII
are
available.
The
texts
are
in
the
original
Latin
and
medieval
German.

The
only
serious
modem
work
of
biography
is
Max
Caspar
Johannes
Kepler,
Stuttgart,
1948.

Abbreviations

O.O.
–
Opera
Omnia.

G.W.
–
Gesammelte
Werke.

Ca.
–
Caspar's
Biography.

Part
IV Chapter 1. THE YOUNG KEPLER

1

O.O.,
Vol.
VIII,
p.
670
seq
.,
henceforth
referred
to
as
"Horoscope".

2

In
1945,
a
French
unit
was
advancing
on
the
town
and
started
shelling
it
in
the
mistaken
belief
that
the
retreating
German
army
had
left
a
rearguard
between
its
walls.
At
the
critical
moment
a
French
officer
whose
name
was
given
to
me
as
Colonel
de
Chastigny
–
arrived
at
the
scene,
identified
it
as
Kepler's
birthplace,
stopped
the
firing
and
saved
Well
from
destruction.

3

"One
of
my
ancestors,
Heinrich,
and
his
brother,
Friedrich,
were
knighted
...
in
143
0,
by
the
Emperor
[
Sigismond]
on
the
bridge
over
the
Tiber
in
Rome."
(Letter
from
Kepler
to
Vincento
Bianchi,
17
February,
1619
;
G.
W.,
Vol.
XVII,
p.
321.)
The
Patent
of
Nobility
is
still
extant,
but
the
two
Keplers
knighted
in
1430
were
called
Friedrich
and
Konrad,
not
Friedrich
and
Heinrich.

4

"Horoscope."

5

Ibid.

6

Ibid.

6a

Kretschmer,
The
Psychology
of
Men
of
Genius
(transl.
R.
B.
Cattell
),
London,
1931.

7

I.e.,
placed very close to the sun.

8

O.O.,
Vol.
V,
p.
476
seq
.;
henceforth
referred
to
as
"Memoir"
.

9

"Memoir."
Cf.
also
letter
to
Herwart
von
Hohenburg.
9/10.4.1599,
G.W.
Vol.
XIII,
p.
305
ff.

10

"Horoscope."

11

Johannes
Kepler
in
seinen
Briefen
,
ed.
Caspar
and
v.
Munich
Dyck
and
Berlin,
1930,
Vol.
I,
p.
26.

12

"Memoir."

13

G.W.,
Vol. XIII, p. 19 f.

14

Tertius
interveniens, G. W., Vol. IV, p. 145 seq.

15

De
Stella nova in pede Serpentarii, G.W., Vol. I, p. 147seq.

16

Tertius
interveniens.

17

De
stella
nova
,
Cap.
28.

18

Antwort
auf
Röslini
Diskurs,
G.W.,
Vol.
IV,
p.
99seq.

19

Ca.,
108.

20

Tertius
interveniens.

21

"Memoir."

21a

Antwort
auf Röslini Diskurs, p. 127.

22

Tertius
interveniens.

23

To
Herwart,
G.W.,
Vol.
XIII,
p.
305
ff.

Part
IV Chapter II. THE "COSMIC MYSTERY"

1

Mysterium
Cosmographicum
(G.W.,Vol.
I),
Preface
to
the
Reader
.

2

Ibid.,
loc. cit.

3

Loc.
cit.

4

Particularly
striking
is
Kepler's
advanced
relativistic
position
in
the
first
chapter
of
the
Mysterium.
For
"metaphysical
and
physical"
reasons,
he
says,
the
sun
must
be
in
the
centre
of
the
world,
but
this
is
not
necessary
for
a
formally
correct
description
of
the
facts.
Concerning
the
Ptolemaic
and
Copernican
views
of
the
apparent
motion
of
the
fixed
stars,
he
says:
"It
is
sufficient
that
both
should
say
(what
both
really
say)
that
this
phenomenon
is
derived
from
a
contrasting
motion
between
earth
and
sky."
Regarding
the
annual
revolution,
he
says
that
the
universe
of
Tycho
(where
five
planets
revolve
round
the
sun
and
the
sun
revolves
round
the
earth)
is
pragmatically
as
legitimate
as
the
Copernican.
"Indeed,
the
proposition
'the
sun
rests
in
the
centre'
is
too
narrow,
goes
too
far.
It
is
sufficient
to
postulate
more
generally:
'the
sun
is
the
centre
of
the
five
planets.'"