Loading Events

« All Events

  • This event has passed.

Stargazing with LDAS – POSTPONED

14 March 2020 @ 7:30 pm - 11:00 pm


Updated on 11 March. 

In view of the current concerns about the Coronavirus (aka Covid-19) we have indefinitely postponed the planned stargazing event for Saturday 14 March. While the risk may generally be regarded as low, we have taken the view that there is no point taking a risk where it can easily be avoided. We will organise an event once the coronavirus  pandemic has been resolved. PLease keep an eye on this website and our Facebook page for future events. In the meantime, keep………………

In the centre of this image, taken with the NASA/ESA Hubble Space Telescope, is the galaxy cluster SDSS J1038+4849 — and it seems to be smiling. You can make out its two orange eyes and white button nose. In the case of this “happy face”, the two eyes are very bright galaxies and the misleading smile lines are actually arcs caused by an effect known as strong gravitational lensing. Galaxy clusters are the most massive structures in the Universe and exert such a powerful gravitational pull that they warp the spacetime around them and act as cosmic lenses which can magnify, distort and bend the light behind them. This phenomenon, crucial to many of Hubble’s discoveries, can be explained by Einstein’s theory of general relativity. In this special case of gravitational lensing, a ring  — known as an Einstein Ring  — is produced from this bending of light, a consequence of the exact and symmetrical alignment of the source, lens and observer and resulting in the ring-like structure we see here. Hubble has provided astronomers with the tools to probe these massive galaxies and model their lensing effects, allowing us to peer further into the early Universe than ever before. This object was studied by Hubble’s Wide Field and Planetary Camera 2 (WFPC2) and Wide Field Camera 3 (WFC3) as part of a survey of strong lenses. A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Judy Schmidt.


14 March 2020
7:30 pm - 11:00 pm
Event Category:


Standalone Farm
Wilbury Road
Letchworth, SG6 4JN United Kingdom
+ Google Map