Pieter Theodorus Oosterhoff was a notable Dutch astronomer who lived from March 30, 1904, to March 14, 1978. He co-administered the Leiden Observatory with Jan Oort and focused his research on variable stars and photometry. His most significant contribution was in 1939 when he identified two distinct populations of globular clusters, which are now referred to as Oosterhoff groups, based on RR Lyrae variable stars. He also played a key role in the International Astronomical Union and was instrumental in establishing the European Southern Observatory.
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Sunsign, Tropical Zodiac
Zodiac Sign (Vedic)
Moonsign, Sidereal Zodiac
Age (Today)
Your next birthday is 276 days away.
Death Anniversary
Next death anniversary is 104 days away.
Death Date
Place of Birth
Time Zone - Europe/Amsterdam (0:19 E)
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Meaning of the name - Pieter
Peter, stone
Read Full Pieter Name AnalysisMarch 30, 1904 Facts
Generation Group
Pieter Oosterhoff belongs to the GI Generation group.
Place of Birth: Leeuwarden
Place of Death: Leiden
Educated At: Leiden University
Occupation: university teacher | astronomer
Employers: Radboud University Nijmegen | Leiden University
Astrology Analysis
Note: This birth chart is calculated using the date and place of birth, with the time set to noon (12:00 PM) local time. While this provides accurate planetary positions for most celestial bodies, the Ascendant (Rising Sign) and house cusps are not calculated since they require precise birth time. For a complete astrological analysis including houses and rising sign, please provide the exact birth time.

Ephemeris for March 30, 1904
Note: Moon position is location and time sensitive.Planet | Position (Tropical, Western) | Transits on March 30, 2025 | Secondary Progressions for March 30, 2025 |
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Sun | 9 Aries 21 | 10 Aries 1 | 5 Leo 53 |
Moon | 25 Virgo 3 | 24 Aries 34 | 28 Aquarius 50 |
Mercury | 13 Aries 8 | 29 Pisces 43 | 25 Leo 2 |
Venus | 13 Pisces 15 | 28 Pisces 17 | 11 Leo 45 |
Mars | 24 Aries 35 | 23 Cancer 7 | 19 Cancer 10 |
Jupiter | 6 Aries 48 | 15 Gemini 45 | 29 Aries 8 |
Saturn | 18 Aquarius 27 | 24 Pisces 14 | 19 Aquarius 4 |
Uranus | 29 Sagittarius 53 | 24 Taurus 42 | 26 Sagittarius 27 |
Neptune | 3 Cancer 13 | 0 Aries 0 | 6 Cancer 48 |
Pluto | 18 Gemini 49 | 3 Aquarius 31 | 21 Gemini 13 |
Rahu | 27 Virgo 6 | 26 Pisces 48 | 20 Virgo 41 |
Ketu | 27 Pisces 6 | 26 Virgo 48 | 20 Pisces 41 |
Chandra Kundali (Equal House, North Indian Diamond Chart)
