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APOD: 2026 October 3 – Selfie at Vera Rubin Ridge

The post APOD: 2026 October 3 – Selfie at Vera Rubin Ridge appeared first on NASA Science .

APOD: 2026 October 3 – Selfie at Vera Rubin Ridge

On October 3, 2026, the Mars rover Curiosity captured a fascinating selfie at the south rim of Vera Rubin Ridge. This snapshot is part of a broader panorama, featuring 61 images taken by the rover's Mars Hand Lens Imager (MAHLI). The selfie image has been edited to remove the imager's arm, while the extended background was captured by the rover's Mastcam on sol 1903.

The panorama includes the distant, 5-kilometer high peak of Mount Sharp, visible at the top of the rover's mast. Curiosity's journey has seen a total elevation gain of 1 kilometer since its launch from the Gale Crater on Earth date August 26, 2026.

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The Curious Case of 1/998001: Missing Number & Math Guide

Originally published at malcolmlow.com . Quick Answer & Key Insight: Why Does 1/998001 Generate All 3-Digit Numbers? Yes, 1/998001 generates every 3-digit sequence. Because 998001 equals $999^2$, the decimal expansion cascades through consecutive integers, but carrying digits at the 998th block creates an unexpected loop trap that skips…

  • Fraction 1/998001 generates all 3-digit numbers in sequence, skipping 998
  • Missing 998 results from carry-over effect of fractions n/1000 where n is 998, 999, 1000
  • Mathematical explanation via Taylor series expansion of 1/(1-x)^2 with x=10^-3

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