# cosmology

> The astropy.cosmology subpackage provides tools for cosmological calculations based on various cosmological models.

- Source: https://doutorai.pt/en/components/skills__cosmology
- Type: Skills
- Category: Scientific
- Downloads: 0
- Site: Doutor AI (https://doutorai.pt/en) - AI tools for small businesses

An open-source community component, curated and adapted by Doutor AI.

## What it does and how to use it

A **skill** that teaches Claude Code to do scientific tasks well. It is packaged knowledge the model uses whenever it is relevant.

1. Install the skill (command above).
2. In Claude Code, describe what you need - the skill turns on by itself when the context fits.
3. No commands to memorize: you talk in plain language and the skill does the rest.

## Install (Claude Code)

```bash
mkdir -p .claude/skills/cosmology && curl -fsSL https://doutorai.pt/data/lib/skills__cosmology.md -o .claude/skills/cosmology/SKILL.md
```

Paste this command into the terminal, in your project folder, and the component installs automatically.

## Content

````
# Cosmological Calculations (astropy.cosmology)

The `astropy.cosmology` subpackage provides tools for cosmological calculations based on various cosmological models.

## Using Built-in Cosmologies

Preloaded cosmologies based on WMAP and Planck observations:

```python
from astropy.cosmology import Planck18, Planck15, Planck13
from astropy.cosmology import WMAP9, WMAP7, WMAP5
from astropy import units as u

# Use Planck 2018 cosmology
cosmo = Planck18

# Calculate distance to z=4
d = cosmo.luminosity_distance(4)
print(f"Luminosity distance at z=4: {d}")

# Age of universe at z=0
age = cosmo.a

- 🔒 Full content on the Pro plan (€7.99/month) -
````

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Content by Doutor AI (https://doutorai.pt/en). When quoting, please cite the source: https://doutorai.pt/en/components/skills__cosmology