A real coverage review, annotated

Exact evidence excerpts

A1

Article headline

NASA's DART impact changed asteroid's orbit forever in planetary defense test

A2

Opening, paragraph 2 (short excerpt)

although NASA knows of no such threats in the foreseeable future

A3

Opening, paragraph 3 (short excerpt)

shortening Dimorphos' nearly 12-hour orbit by a whopping 32 minutes

A4

Body, paragraph beginning “The DART spacecraft” (short excerpt)

which cost about $314 million

R1

NASA release, paragraph beginning “Prior to DART’s impact” (short excerpt)

the spacecraft’s impact altered Dimorphos’ orbit around Didymos by 32 minutes

R2

Same NASA paragraph, final sentence

This measurement has a margin of uncertainty of approximately plus or minus 2 minutes.

R3

NASA release, paragraph beginning “Neither Dimorphos”

Neither Dimorphos nor Didymos poses any hazard to Earth before or after DART’s controlled collision with Dimorphos.

1. What landed

The mission demonstrated asteroid deflection.

Present · Headline

The headline explicitly connects a changed orbit with a planetary-defense test. This is presence, not proof of audience understanding.

Evidence: A1

A1 · Article headline

NASA's DART impact changed asteroid's orbit forever in planetary defense test

The measured orbital change was 32 minutes, with about two minutes of uncertainty.

Partial · Opening

The excerpt includes the 32-minute change but not its uncertainty. The complete demonstration message did not land in this excerpt. That omission does not make the reported number false.

Evidence: A3; compare R1 and R2

A3 · Opening, paragraph 3 (short excerpt)

shortening Dimorphos' nearly 12-hour orbit by a whopping 32 minutes

R1 · NASA release, paragraph beginning “Prior to DART’s impact” (short excerpt)

the spacecraft’s impact altered Dimorphos’ orbit around Didymos by 32 minutes

R2 · Same NASA paragraph, final sentence

This measurement has a margin of uncertainty of approximately plus or minus 2 minutes.

These particular asteroids were not a threat to Earth.

Partial · Opening

The article excerpt gives broad reassurance about known threats. It does not explicitly name the two asteroids in that reassurance, unlike the supplied reference.

Evidence: A2; compare R3

A2 · Opening, paragraph 2 (short excerpt)

although NASA knows of no such threats in the foreseeable future

R3 · NASA release, paragraph beginning “Neither Dimorphos”

Neither Dimorphos nor Didymos poses any hazard to Earth before or after DART’s controlled collision with Dimorphos.

2. What needs checking

The orbit shortened by 32 minutes.

Supported by supplied source

The article and contemporaneous release agree on the measured change. R2 supplies the uncertainty; the reference is NASA’s own account, not independent verification.

Article: A3 · Reference: R1

A3 · Opening, paragraph 3 (short excerpt)

shortening Dimorphos' nearly 12-hour orbit by a whopping 32 minutes

R1 · NASA release, paragraph beginning “Prior to DART’s impact” (short excerpt)

the spacecraft’s impact altered Dimorphos’ orbit around Didymos by 32 minutes

DART cost about $314 million.

Unresolved

The selected NASA reference excerpts do not establish this amount or its accounting scope. This is not evidence that the cost is wrong. Check a dated mission budget source before making a correction request.

Article: A4 · Reference: No supporting cost passage supplied

A4 · Body, paragraph beginning “The DART spacecraft” (short excerpt)

which cost about $314 million

3. What to do next

No correction request on the 32-minute result based on this evidence.

If using the number in your own summary, preserve its approximate two-minute uncertainty.

Suggested owner: PR reviewer · Evidence: A3, R1, R2

A3 · Opening, paragraph 3 (short excerpt)

shortening Dimorphos' nearly 12-hour orbit by a whopping 32 minutes

R1 · NASA release, paragraph beginning “Prior to DART’s impact” (short excerpt)

the spacecraft’s impact altered Dimorphos’ orbit around Didymos by 32 minutes

R2 · Same NASA paragraph, final sentence

This measurement has a margin of uncertainty of approximately plus or minus 2 minutes.

Verify the cost against a dated budget source if it matters to your brief.

Confirm what the amount includes and the relevant time period; keep it unresolved until then.

Suggested owner: Subject-matter expert · Evidence: A4

A4 · Body, paragraph beginning “The DART spacecraft” (short excerpt)

which cost about $314 million

Adjust the next brief to make uncertainty and the no-threat context easy to quote.

This is a message-planning suggestion, not a demand that an outlet include every preferred message.

Suggested owner: Communications lead · Evidence: A2, A3, R2, R3

A2 · Opening, paragraph 2 (short excerpt)

although NASA knows of no such threats in the foreseeable future

A3 · Opening, paragraph 3 (short excerpt)

shortening Dimorphos' nearly 12-hour orbit by a whopping 32 minutes

R2 · Same NASA paragraph, final sentence

This measurement has a margin of uncertainty of approximately plus or minus 2 minutes.

R3 · NASA release, paragraph beginning “Neither Dimorphos”

Neither Dimorphos nor Didymos poses any hazard to Earth before or after DART’s controlled collision with Dimorphos.

Human review

Demonstration reviewer decision: accept the 32-minute comparison; amend the summary to include uncertainty; retain the cost check as unresolved; do not request a correction on this evidence. This is a sample decision, not approval by NASA, Space.com or a real client.

Sample final summary

In the reviewed excerpts, the deflection result appears in the headline and the 32-minute change appears in the opening. The supplied NASA release supports that change and gives an approximately ±2-minute uncertainty. No factual error is established here. The cost remains unverified against the supplied excerpts. Verify it if material, and make uncertainty and no-threat context clearer in the next brief.

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