'Show and Tell' Demonstration Talks


Ancient Light
The Universe is vast and ancient. Large telescopes have imaged galaxies that are billions of light-years distant. Is it possible to capture an image of one of these very remote objects without a telescope?

Appendix: How can the light ever reach us?


  Recording   Handout






Building a Cloud Chamber
A cloud chamber shows the tracks of charged particles as they pass through and so can be used to see radiation from the Earth and cosmic rays. This short talk describes how I designed and built one.

The design and construction:
https://www.liv.ac.uk/~sdb/Astro/BCC-flyer.pdf


  Recording   Handout






Building a Tellurion
A tellurion is a model of the Earth-Moon-Sun system that demonstrates the changing seasons, the phases of the Moon, and predicts eclipses.


  Recording   Handout






iOptron SkyTracker
The iOptron SkyTracker is a motor-driven camera mount that allows long-exposure photographs of the night sky to be taken without the stars trailing.


  Recording   Handout






K2 Star Tracker
K2 is a low-cost star tracker that I designed, built, tested and then used to photograph the night sky.

A description of the components and the construction is here: https://www.liv.ac.uk/~sdb/Astro/K2.pdf


  Recording   Handout






Tri-band Tribulations
Filters that transmit multiple wavelengths simultaneously allow colour cameras (such as DSLRs) to image astronomical objects despite the sky glow produced by street lights. This short talk shows some examples of how effective these filters can be.


  Recording   Handout


Steve Barrett       March 2024

S.D.Barrett@liv.ac.uk
Demonstrations are nominally 30 minutes in length

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