This was
your sky.
Magnetic Mars
Instruments on the Mars Global Surveyor spacecraft have mapped banded magnetic field patterns on Mars. This was a startling discovery, suggesting that the Red Planet was more Earth-like in its distant past. The red and blue regions within the orbital tracks indicate adjacent areas where magnetic fields point in opposite directions. These bands run east-west, about 100 miles wide and 600 miles long.
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In tropical astrology, 4 MAY 1999 falls under Taurus (♉). The sign's window runs from 04-20 through 05-20. Taurus holds the Pleiades star cluster and Aldebaran, the red giant that marks the eye of the Bull. The Sun was crossing this region of the sky on 4 MAY 1999.