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1971
Activity from Friends
The Approach of Mars
S15 E01 • Tuesday, Jan 13, 1970 • Jan 13
Things are Seldom What They Seem
S15 E02 • Wednesday, Feb 3, 1971 • Feb 3
Sirius, the Dog-Star
S15 E03 • Tuesday, Mar 3, 1970 • Mar 3
A Black Hole in Space?
S15 E04 • Thursday, Apr 1, 1971 • Apr 1
Jupiter - the Other Magnetic Planet
S15 E05 • Tuesday, Apr 27, 1971 • Apr 27
Orbiting Space-Stations
S15 E06 • Tuesday, Jun 8, 1971 • Jun 8
Tracking the Stars
S15 E07 • Wednesday, Jun 30, 1971 • Jun 30
How Far Are the Stars?
S15 E08 • Wednesday, Jul 21, 1971 • Jul 21
Mars Comes Close
S15 E09 • Wednesday, Aug 18, 1971 • Aug 18
The Life and Death of a Star
S15 E10 • Wednesday, Sep 15, 1971 • Sep 15
Kepler, Genius and Mystic
S15 E11 • Wednesday, Oct 13, 1971 • Oct 13
Mars
S15 E12 • Wednesday, Nov 17, 1971 • Nov 17
The Royal Observatory Telescope
S15 E13 • Tuesday, Dec 7, 1971 • Dec 7
1971
1970 • 13 Episodes
Activity from Friends
The Approach of Mars
S15 E01 • Tuesday, Jan 13, 1970 • Jan 13
Things are Seldom What They Seem
S15 E02 • Wednesday, Feb 3, 1971 • Feb 3
Sirius, the Dog-Star
S15 E03 • Tuesday, Mar 3, 1970 • Mar 3
A Black Hole in Space?
S15 E04 • Thursday, Apr 1, 1971 • Apr 1
Jupiter - the Other Magnetic Planet
S15 E05 • Tuesday, Apr 27, 1971 • Apr 27
Orbiting Space-Stations
S15 E06 • Tuesday, Jun 8, 1971 • Jun 8
Tracking the Stars
S15 E07 • Wednesday, Jun 30, 1971 • Jun 30
How Far Are the Stars?
S15 E08 • Wednesday, Jul 21, 1971 • Jul 21
Mars Comes Close
S15 E09 • Wednesday, Aug 18, 1971 • Aug 18
The Life and Death of a Star
S15 E10 • Wednesday, Sep 15, 1971 • Sep 15
Kepler, Genius and Mystic
S15 E11 • Wednesday, Oct 13, 1971 • Oct 13
Mars
S15 E12 • Wednesday, Nov 17, 1971 • Nov 17
The Royal Observatory Telescope
S15 E13 • Tuesday, Dec 7, 1971 • Dec 7