RE: {Altair_B - 5582} -: Trams - Royal Russell School meeting this Friday - Alternatives
John Murrell
You always have alternatives --
The Royal Astronomical Society general meeting should go ahead as normal – looks like 3 very interesting talks – details on the RAS web site.
Also Ewell AS are starting their 50th Anniversary Celebrations with a talk about the History of the Society. Normal Bus and train links should be operating to Ewell.
Regards
John Murrell
From: alta...@googlegroups.com [mailto:alta...@googlegroups.com] On Behalf Of Paul Harper
Sent: 09 November 2016 20:01
To: alta...@googlegroups.com
Subject: {Altair_B - 5582} -: Trams - Royal Russell School meeting this Friday
Dear all,
As some of you may know, there was a serious tram accident in Croydon this morning.
I have been in contact with Tfl in respect of the possibility of trams running through to Addington this Friday.
They advise they will try their best to get eveything uo and running, but it's likely to be the weekend before things get back to normal.
Therefore this will effect those who travel to the Royal Russell School by train. Trams are currently running to Reeves Corner from Wimbledon.
You can catch a 466 bus from the Katherine Street (Croydon Library) Get off at Coombe Lane Tram bus stop and walk down to the School. This service is currently on diversion, but should be back to normal route on Friday.
This will be effecting me and several of you who use the tram.
Regards,
Paul Harper
Croydon AS
--
You received this message because you are subscribed to the Google Groups "Altair_B" group.
To unsubscribe from this group and stop receiving emails from it, send an email to altair_b+u...@googlegroups.com.
To post to this group, send email to alta...@googlegroups.com.
Visit this group at https://groups.google.com/group/altair_b.
For more options, visit https://groups.google.com/d/optout.
John Murrell
The RAS general meeting this afternoon was very good.
Prof. Gerry Gilmore’s talk on the DR1 data results was quite amazing – they have an movement in the mirror position on Gaia they have identified – he showed the errors that are one of the limiting uncertainties in the DR1 results – he then pointed out that the error was less 1/10th diameter of a Helium atom movement !
During his 35 min talk Gaia has made something over 100 million measurements.
Some interesting sound bites amongst a lot of new data that needs investigation
· Globular clusters do not appear to be spherical
· The Pleiades distance anomaly has been solved the Gaia results agree with the astrophysics – the remaining question is why did Hipparcos give the wrong distance ?
· Gaia has detected more stars than expected – not clear if this is a result of a better sensitivity or their being more stars ?
· Gaia16AYE – they have 10k amateur brightness observations – the really critical point is I think next Wednesday when the star is expected to brighten by 3 magnitudes. If the timing and amplitude is confirmed this will be good evidence that the event is due to a passing 10 solar mass black hole. Amateur and professional telescopes are watching.
· Several anomalies in the HR diagram have been identified from the Gaia data though the version he showed was only from a small sub-set of the data in DR1
The talk on Georges Lemaitre was interesting – one sound bite was that he enlisted in the Belgium Army in WW1 – he was sent on the officer training course after a years’ service. On the course they taught artillery, he pointed out that there was a fundamental error in their trajectory calculations – rather than thanking him and correcting the error they threw him off the course so he remained in the ranks for WW1.
The third talk was about the discovery of the remains of the Ice Dam and flood channels in the bed of the English Channel which were formed at the end of the last ice age when the water burst through the Chalk Ridge joining dower to France. This was the subject of a couple of TV programmes a couple of years ago. While there seems to be convincing evidence of the flood channels and where the chalk ridge was bridged they do not have a root cause for the failure of the chalk. The estimate of the time taken to drain the link was around 3 weeks with a volume of water comparable to the Amazon. One possibility is that the breach was the result of an Earthquake as this area is the most active seismic area in the UK. One other interesting fact was the channel tunnel was diverted to the North of the scour pits – the geologists identified the sediment filled depressions that are up to 50m deep but did not know the cause of them. The initial discovery was accidental as they decided to commission a new multi-beam sonar in UK waters as support was more available here.
I don’t know if the video will be put on line as they seem to be rather slow in getting them edited and on-line.
Hope the next meeting is as good,
Regards
John Murrell