The Black Holes Printables Bundle

All three black holes packs in one download, A4 and US Letter: the Reference Guide, the Activity Pack and Black Holes by Numbers. $11.99 instead of $15.47 bought separately.

What’s inside:

• The Black Holes Reference Guide
• Black Holes Activity Pack: Cards, Quiz and Worksheets
• Black Holes by Numbers: Fact Sheet and Charts

Pages: 37 (A4) / 37 (US Letter). Formats: A4 (210 × 297 mm) and US Letter (8.5 × 11 in), both PDFs included in one zip.

Printing: Print at 100% / actual size on A4 or US Letter. Most inside pages use light backgrounds and print well in black and white; the cover and a few drawings are dark, so print those in colour or skip them to save ink.

Every fact is written in our own words and checked against named sources from NASA (NASA Science, NASA Space Place and the Chandra X-ray Observatory), ESO, ESA, the Nobel Prize site, LIGO Caltech, Encyclopaedia Britannica and the Royal Society (checked 10 Nov 2026); the sources are listed on the credits page. Where sources give different figures, each is shown with its source. Our own opinions are clearly labelled.

Drawings and charts are our own. Photos are from Wikimedia Commons under Creative Commons or public-domain terms, credited on the credits page. Not affiliated with or endorsed by NASA, ESO, ESA, the Event Horizon Telescope Collaboration, LIGO, the Nobel Foundation, Encyclopaedia Britannica, the Royal Society or any other organisation, scientist or photographer named here.

Licence: personal use. Print as many copies as you need for yourself and your household. Please don’t resell, re-upload or share it publicly. For club, school or commercial use, please email info@reallybyte.com.

Made by REALLYBYTE, the team behind black-holes.galaxies.im. Questions: info@reallybyte.com

This is a digital download: no physical item will be shipped.