---
title: The Moon's gravity is about one sixth of the Earth's gravity. — Thinking like an astronomer · tree and pragmatics
description: The Moon's gravity is about one sixth of the Earth's gravity. Who acts: gravity. A sentence of the lesson «Thinking like an astronomer» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Thinking like an astronomer, sentence 10

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The Moon's gravity is about one sixth of the Earth's gravity.

<!-- .vintro -->
**Who acts:** gravity · **What happens:** be

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This is a sentence of the lesson «Thinking like an astronomer» of the world course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (gravity), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:010-reasoning-about-space.lesson:10
# text = The Moon's gravity is about one sixth of the Earth's gravity.
# source = school lesson (ours)
# course = world
# lesson = 010-reasoning-about-space.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): no change
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Moon	Moon	PROPN	NNP	Number=Sing	4	nmod:poss	_	_
3	's	's	PART	POS	_	2	case	_	_
4	gravity	gravity	NOUN	NN	Number=Sing	8	nsubj	_	_
5	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	cop	_	_
6	about	about	ADP	IN	_	8	case	_	_
7	one	one	NUM	CD	NumForm=Word|NumType=Card	8	nummod	_	_
8	sixth	sixth	NOUN	NN	Number=Sing	0	root	_	_
9	of	of	ADP	IN	_	13	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	Earth	Earth	PROPN	NNP	Number=Sing	13	nmod:poss	_	_
12	's	's	PART	POS	_	11	case	_	_
13	gravity	gravity	NOUN	NN	Number=Sing	8	nmod	_	_
14	.	.	PUNCT	.	_	8	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | the Moon's gravity |  |  |  |  | about one sixth; of the Earth's gravity | tree rules |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:world:010-reasoning-about-space.lesson:10`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): no change. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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