It's a place in the mutual orbits of Earth and Mars. When Mars is at western quadrature in Earth's sky, Earth is at or near a greatest elongation - greatest distance from the sun on the sky's dome - as seen from Mars. See the chart below.
The Milky Way rising over the famous buried ghost tracks on the beach at Cape May, New Jersey, early on the morning of March 16. Photographer John Entwistle said, “The old railroad tracks, which were used in the early 1900s to transport goods, recently became exposed due to the nor’easter storms.”
On this chart, Mars is red, and Earth is blue. Earth will soon catch up to Mars in its smaller, faster orbit. By July, Mars will be closer and brighter than since 2003.
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