Lesson 4 of 4 · Milestones and curation
Follow milestones and protect the evidence
6 minute lesson · 3 checks along the way
Your goal for this lessonDistinguish confirmed flight events from future objectives and explain how contamination records make returned samples interpretable.
In this lesson 3 sections · 3 checks
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Keep achieved and planned events separate
JAXA confirmed MMX’s launch aboard H3 Flight 10 at 04:41:03 Japan Standard Time on October 20, 2026. Spacecraft separation was confirmed about 71 minutes 13 seconds later. As reviewed on October 24, 2026, Mars arrival in 2027, later Phobos operations and a return in 2031 remain plans. A successful launch is an important beginning, not evidence that those later steps have happened.
Time zones can make accounts look inconsistent. Japan Standard Time is nine hours ahead of UTC, so the stated launch corresponds to 19:41:03 UTC on October 19. Both dates can describe the same event. Keep the time-zone label with the timestamp, and compare dated event reports before deciding that two histories contradict each other.
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Protect the sample before it exists on Earth
Contamination control starts during hardware design, cleaning, assembly and testing. The MMX curation team describes monitoring materials that record possible contamination and witness plates that accompany the sampling system. Such records help investigators distinguish material from the target from substances introduced by equipment or handling. A clean-looking surface is not evidence that every scientifically important contaminant is absent.
Consider an original laboratory exercise. A sample and a handling blank both contain the same organic compound. The blank is material processed to reveal contamination from the procedure. The overlap is a reason to investigate the source; it is not automatic proof that the compound is indigenous to Phobos. Nor does it prove that every sample measurement is useless. Compare quantities, controls and handling histories before interpreting the result.
Launch is achieved; later steps remain plans
Original teaching diagram. Status reviewed October 24, 2026; future milestones are not guarantees.
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Preserve a chain that another scientist can follow
After recovery, curation connects containers, gases, bulk material and individual grains to documented procedures. Allocation records must retain which portion was examined, how it was handled and what remains available. Future analyses may ask questions that the first investigators did not anticipate. Preserving part of a collection keeps those opportunities open.
A useful concluding statement contains three parts: the event or measurement actually established, the inference drawn from it and the unresolved next step. For MMX in October 2026, that means recognizing the achieved launch while retaining the planned status of Mars-system science and sample return. Later reports can change that assessment. They should add evidence to the history rather than silently turn an old prediction into a completed result.
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