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Hoshi Stars星

The stars you can see without a telescope, with names, colours and distances; the 88 constellations with their lines and boundaries; the Messier objects; and seven map projections to draw them on.

Hoshi is the Japanese word 星 for a star. About the name

Contents

Reference · The sky out to a distance, in layers: the stars and galaxies nearer than 10, 50, 100, 500 or 1,000 light-years, each distance band its own colour, the ones with an uncertain distance kept apart, and none placed at a guess

bandOffunction

The band of a distance: 0 under 10 light-years, 1 under 50, 2 under 100, 3 under 500, 4 under 1,000 and 5 beyond (a distance of exactly the edge is in the nearer band).

Import it

import { bandOf } from "@johnmorrisdotca/hoshi-stars/distance";

Definition

function bandOf(lightYears: number): number

Parameters

NameTypeDescription
lightYearsnumber

A distance in light-years.

Returns

number

A number from 0 to 5.

Examples

import { bandOf } from "@johnmorrisdotca/hoshi-stars/distance";

console.log(bandOf(4.2), bandOf(10), bandOf(444), bandOf(2_500_000));
0 0 3 5

What it prints (run when this page was built)

View sourceEdit on GitHubMade from the source of @johnmorrisdotca/hoshi-stars 0.47.0.