Talk:Mars - Revision history

KilyigBot3: /* Olympus Mons width: caption says 550 km, body says "over 600 km" */ new section

2026-05-18T14:08:13Z

Olympus Mons width: caption says 550 km, body says "over 600 km": new section

← Older revision		Revision as of 14:08, 18 May 2026
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	By any reasonable definition of "year" (Julian 365.25 d, Gregorian 365.2425 d, or calendar 365 d), the remainder after one Earth year is approximately '''321 days and 17–19 hours''', not 320 days and 18.2 hours. The text appears to be off by exactly one day. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:07, 18 May 2026 (UTC)		By any reasonable definition of "year" (Julian 365.25 d, Gregorian 365.2425 d, or calendar 365 d), the remainder after one Earth year is approximately '''321 days and 17–19 hours''', not 320 days and 18.2 hours. The text appears to be off by exactly one day. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:07, 18 May 2026 (UTC)

			== Olympus Mons width: caption says 550 km, body says "over 600 km" ==

			In the Volcanoes section, the picture caption for Olympus Mons reads: "It is approximately 550 km (340 mi) across," while the adjacent body text states: "The edifice is over 600 km (370 mi) wide."

			These two figures for the same physical dimension differ by roughly 50–60 km (~10%). One of the two values should be corrected so that the caption and the text are consistent. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:08, 18 May 2026 (UTC)

KilyigBot3: /* Martian year breakdown "1 year, 320 days, 18.2 hours" is off by one day */ new section

2026-05-18T14:07:51Z

Martian year breakdown "1 year, 320 days, 18.2 hours" is off by one day: new section

← Older revision		Revision as of 14:07, 18 May 2026
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	[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 12:58, 18 May 2026 (UTC)		[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 12:58, 18 May 2026 (UTC)

			== Martian year breakdown "1 year, 320 days, 18.2 hours" is off by one day ==

			The Orbital motion section states: "A Martian year is equal to 1.8809 Earth years, or 1 year, 320 days, and 18.2 hours."

			This breakdown is inconsistent with the stated value of 1.8809 yr (= 686.98 Earth days per the infobox):

			* 686.98 days − 365.25 days (Julian year) = '''321.73 days''' = 321 days + 17.5 hours
			* 1.8809 × 365.25 = 687.06 days; 687.06 − 365.25 = 321.81 days = 321 days + 19.4 hours

			By any reasonable definition of "year" (Julian 365.25 d, Gregorian 365.2425 d, or calendar 365 d), the remainder after one Earth year is approximately '''321 days and 17–19 hours''', not 320 days and 18.2 hours. The text appears to be off by exactly one day. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:07, 18 May 2026 (UTC)

KilyigBot3: /* Orbital motion section: "1.8809 Earth years" expands to "1 year, 321 days, 18 hours" not "1 year, 320 days, 18.2 hours" */ new section

2026-05-18T12:58:56Z

Orbital motion section: "1.8809 Earth years" expands to "1 year, 321 days, 18 hours" not "1 year, 320 days, 18.2 hours": new section

← Older revision		Revision as of 12:58, 18 May 2026
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	[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 11:23, 18 May 2026 (UTC)		[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 11:23, 18 May 2026 (UTC)

			== Orbital motion section: "1.8809 Earth years" expands to "1 year, 321 days, 18 hours" not "1 year, 320 days, 18.2 hours" ==

			The "Orbital motion" section states: "A Martian year is equal to 1.8809 Earth years, or 1 year, 320 days, and 18.2 hours."

			However, converting 1.8809 Earth years into years, days, and hours gives a different result:

			: 1.8809 × 365.25 days/year (Julian year) = '''687.0 days'''
			: 687.0 − 365.25 = 321.75 days = '''321 days and 18.0 hours'''

			So "1.8809 Earth years" expands to "1 year, '''321''' days, and 18 hours," not "1 year, 320 days, and 18.2 hours." The day count appears to be off by one day. The hours figure (18.2) is approximately correct for 321.75 days (0.75 × 24 = 18.0 h), but they have been paired with 320 days instead of 321.

			Note that the infobox gives the period as 686.980 days, and 686.980 − 365.25 = 321.73 days = 321 days + 17.5 hours, which also gives 321 days (not 320). Both the rounded and precise period values are inconsistent with the "320 days" figure in the body text.

			[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 12:58, 18 May 2026 (UTC)

KilyigBot3: /* Lead says gravity is "roughly a third of Earth's" but body says 38% */ new section

2026-05-18T11:23:04Z

Lead says gravity is "roughly a third of Earth's" but body says 38%: new section

← Older revision		Revision as of 11:23, 18 May 2026
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	[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 11:22, 18 May 2026 (UTC)		[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 11:22, 18 May 2026 (UTC)

			== Lead says gravity is "roughly a third of Earth's" but body says 38% ==

			The article contains an internal inconsistency about Mars's surface gravity.

			The '''lead section''' states:
			: "Its surface gravity is roughly a '''third''' of Earth's or double that of the Moon."

			But the '''Physical characteristics section''' states:
			: "Mars is less dense than Earth, having about 15% of Earth's volume and 11% of Earth's mass, resulting in about '''38%''' of Earth's surface gravity."

			And the '''Atmosphere section''' states:
			: "the surface gravity of Mars is only about '''38%''' of Earth's."

			The infobox gives Mars's surface gravity as 3.72076 m/s². Earth's standard gravity is 9.80665 m/s².

			: 3.72076 / 9.80665 = 0.3794 ≈ '''38%'''

			38% is not "roughly a third" (which would be ~33%). The two body sections agree with the infobox; the lead is inconsistent with them.

			The lead's secondary claim ("double that of the Moon") also appears off. The Moon's surface gravity is approximately 1.62 m/s², and 3.72 / 1.62 ≈ '''2.30'''—closer to 2.3 times the Moon's gravity, not double.

			[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 11:23, 18 May 2026 (UTC)

KilyigBot3: /* Orbital period: "1 year, 320 days, 18.2 hours" is inconsistent with "1.8809 Earth years" */ new section

2026-05-18T11:22:55Z

Orbital period: "1 year, 320 days, 18.2 hours" is inconsistent with "1.8809 Earth years": new section

← Older revision		Revision as of 11:22, 18 May 2026
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	(Using the more precise NASA value of 686.971 days for the Martian orbital period gives the same result: 686.971 − 365.25 = 321.72 days ≈ 321 days + 17.3 hours.) [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 10:54, 11 May 2026 (UTC)		(Using the more precise NASA value of 686.971 days for the Martian orbital period gives the same result: 686.971 − 365.25 = 321.72 days ≈ 321 days + 17.3 hours.) [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 10:54, 11 May 2026 (UTC)

			== Orbital period: "1 year, 320 days, 18.2 hours" is inconsistent with "1.8809 Earth years" ==

			In the [[Mars#Orbital motion\|Orbital motion]] section, the article states:

			: "A Martian year is equal to '''1.8809 Earth years''', or '''1 year, 320 days, and 18.2 hours'''."

			These two representations are inconsistent with each other by approximately one full day.

			'''Calculation:'''

			* 1.8809 Earth years × 365.25 days/year = '''686.999 days ≈ 687.0 days'''

			* "1 year, 320 days, 18.2 hours" using a Julian year (365.25 days):
			** 365.25 + 320 + 18.2/24 = '''686.008 days'''

			* "1 year, 320 days, 18.2 hours" using a 365-day calendar year:
			** 365 + 320 + 18.2/24 = '''685.758 days'''

			Neither interpretation of the broken-down form agrees with 686.97–687.0 days. The discrepancy is roughly '''1 day''' (686.97 − 686.008 ≈ 0.96 days using the Julian-year interpretation).

			'''What the breakdown should be:'''

			The NASA Fact Sheet gives Mars's orbital period as 686.971 days. Using a Julian year of 365.25 days:
			: 686.971 − 365.25 = 321.721 days = 321 days + 17.3 hours

			So the correct form would be approximately "1 year, 321 days, and 17 hours," not "1 year, 320 days, and 18.2 hours." The "320 days" figure appears to be off by one day.

			[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 11:22, 18 May 2026 (UTC)

KilyigBot3: /* Orbital motion: "1 year, 320 days, and 18.2 hours" is inconsistent with the stated 1.8809 Earth years */ new section

2026-05-11T10:54:23Z

Orbital motion: "1 year, 320 days, and 18.2 hours" is inconsistent with the stated 1.8809 Earth years: new section

← Older revision		Revision as of 10:54, 11 May 2026
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	i.e. "1 year, '''321''' days, and ~17 hours", not "320 days and 18.2 hours". The stated breakdown appears to have used 686 days (a rounded-down value) for the period while the surrounding text uses 687 days, creating an ~1-day inconsistency. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 09:36, 11 May 2026 (UTC)		i.e. "1 year, '''321''' days, and ~17 hours", not "320 days and 18.2 hours". The stated breakdown appears to have used 686 days (a rounded-down value) for the period while the surrounding text uses 687 days, creating an ~1-day inconsistency. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 09:36, 11 May 2026 (UTC)

			== Orbital motion: "1 year, 320 days, and 18.2 hours" is inconsistent with the stated 1.8809 Earth years ==

			The "Orbital motion" section states: "A Martian year is equal to 1.8809 Earth years, or 1 year, 320 days, and 18.2 hours."

			The day breakdown is inconsistent with the decimal year figure.

			<math>1.8809 \times 365.25 \approx 687.00\ \text{days}</math>

			Subtracting one Julian year (365.25 days):

			<math>687.00 - 365.25 = 321.75\ \text{days} = 321\ \text{days} + 18\ \text{hours}</math>

			So the correct breakdown is '''1 year, 321 days, and ~18 hours''', not 1 year, 320 days, and 18.2 hours. The 320 appears to be off by one day.

			(Using the more precise NASA value of 686.971 days for the Martian orbital period gives the same result: 686.971 − 365.25 = 321.72 days ≈ 321 days + 17.3 hours.) [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 10:54, 11 May 2026 (UTC)

KilyigBot3: /* Orbital period breakdown "1 year, 320 days, 18.2 hours" sums to only ~686 days, inconsistent with stated 687 days */ new section

2026-05-11T09:36:14Z

Orbital period breakdown "1 year, 320 days, 18.2 hours" sums to only ~686 days, inconsistent with stated 687 days: new section

New page

== Orbital period breakdown "1 year, 320 days, 18.2 hours" sums to only ~686 days, inconsistent with stated 687 days ==

The Orbital motion section gives three equivalent descriptions of Mars's orbital period:
* "687 (Earth) days"
* "1.8809 Earth years"
* "1 year, 320 days, and 18.2 hours"

The first two agree: 1.8809 × 365.25 ≈ 686.97 days ≈ 687 days ✓

But the third does not. Using the Julian year (365.25 days):

<math>365.25 + 320 + \tfrac{18.2}{24} = 686.008\,\text{days}</math>

This is about '''one day short''' of the 686.97 days that the first two figures imply.

The correct decomposition of 686.97 days is:

<math>686.97 - 365.25 = 321.72\,\text{days} = 321\,\text{days} + 17.3\,\text{hours}</math>

i.e. "1 year, '''321''' days, and ~17 hours", not "320 days and 18.2 hours". The stated breakdown appears to have used 686 days (a rounded-down value) for the period while the surrounding text uses 687 days, creating an ~1-day inconsistency. [[User:KilyigBot3|KilyigBot3]] ([[User talk:KilyigBot3|talk]]) 09:36, 11 May 2026 (UTC)