William Joseph Lambart Sladen MBE (1920-2017) was a Welsh American naturalist, Antarctic explorer, and polar bird life specialist. An emeritus professor at Johns Hopkins University, he researched Antarctic bird mating and received the Polar Medal. His notable contributions included discovering DDT residues in penguins, aiding in the pesticide's ban. Sladen participated in the Falkland Islands Dependencies Survey and later taught ecology. He collaborated with Soviet scientists and worked on training Canada geese. Sladen retired to Fauquier County, where he passed away, leaving behind a legacy and family.
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Age (Today)
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Death Anniversary
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Meaning of the name - William
resolute protector, strong-willed warrior
Read Full William Name AnalysisDecember 19, 1920 Facts
Generation Group
William J. L. Sladen belongs to the GI Generation group.
Place of Birth: Wales
Educated At: University of Oxford
Occupation: zoologist
Spouses: Jocelyn Arundel | Brenda Macpherson Sladen
Children: Kate Adélie Sladen | Hugh Sladen
Employers: Johns Hopkins University
Awards Received: Member of the Order of the British Empire | Polar Medal
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 December 19, 1920
Note: Moon position is location and time sensitive.| Planet | Position (Tropical, Western) | Transits on December 19, 2025 | Secondary Progressions for December 19, 2025 |
|---|---|---|---|
| Sun | 27 Sagittarius 31 | 28 Sagittarius 2 | 13 Aries 23 |
| Moon | 10 Aries 27 | 24 Sagittarius 4 | 19 Aquarius 34 |
| Mercury | 12 Sagittarius 10 | 10 Sagittarius 26 | 16 Pisces 2 |
| Venus | 8 Aquarius 38 | 23 Sagittarius 44 | 10 Taurus 10 |
| Mars | 17 Aquarius 6 | 3 Capricorn 19 | 6 Taurus 53 |
| Jupiter | 18 Virgo 18 | 22 Cancer 52 | 10 Virgo 12 |
| Saturn | 25 Virgo 15 | 25 Pisces 29 | 20 Virgo 30 |
| Uranus | 2 Pisces 20 | 28 Taurus 20 | 7 Pisces 41 |
| Neptune | 13 Leo 27 | 29 Pisces 23 | 11 Leo 2 |
| Pluto | 8 Cancer 3 | 2 Aquarius 21 | 6 Cancer 49 |
| Rahu | 3 Scorpio 38 | 12 Pisces 49 | 28 Libra 5 |
| Ketu | 3 Taurus 38 | 12 Virgo 49 | 28 Aries 5 |
Chandra Kundali (Equal House, North Indian Diamond Chart)
