A little ramble through 19th century astronomy - meteor over Sweden in 1876

 Nature August 3^rd 1876

A fall of meteorites, we learn from Aftonblad, took place on June 28^th, between 11.00 and 12.00 am near Stalldalen, a station non the Swedish Central Railway, in the northern most part of Orebrolan. Several fell, some on the ground and others in a lake. Two were found, one about the size of the fist band weighing 4.5 lbs, the other smaller.

Eyewitnesses stated that a loud whistling was first heard in the air from west to east, and a light was plainly distinguishable; although the sky was clear and cloudless, thereafter two very sharp reports were heard, the second succeeding the first after a momentary interval, followed by several others less sharp, resembling thunder, after which the falling stones were observed by eight or ten persons; and finally, there was seen in the air a whirling smoke, not very high up.

A meteor was observed simultaneously at Stockholm and at other places. At thirteen English miles south west of Linkoping it was seen first in a north westerly direction pretty high up in the sky, and it then sank down in about ten seconds towards the horizon in the west. It had the appearance of a large pear a foot long, which, notwithstanding the bright sunshine, left behind a clear shinning streak of six to eight feet in appearance length, which finally broke up into a multitude of starlike sparks. Here no noise was heard.

According to a communication from the Stockholm Meteorological Bureau, there is reason to believe that the phenomenon arose from the “Kulblixt” which generally appears as a luminous round object, and often on approaching the ground, assumes a lengthened form and a blinding white colour, and bursts asunder, commonly with a loud report. As all who observed the meteor, both in Stockholm and in Sodernanland , saw the luminous appearance in the same direction, viz. W N W, it is probable that the light proceeded from the main mass of the meteor situated at a very great distance.

The phenomenon observed here at Stockholm must therefore have been an illusion, the object, instead of being, as most people estimated, within a few thousand feet, being actually at a great distance.

Later information shows that the phenomenon was visible over a great part of middle Sweden.

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Cooke Telescope Tales - telescope for sale in Ormskirk in 1968

 A Cooke Troughton 5 inch telescope was being offered for sale in Ormskirk by W A Howe in 1968. There was also a 14 foot diameter dome observatory for sale. 

The fact that this was advertised as a Cooke Troughton telescopes suggest it was post a relatively modern instrument being a post 1922 instrument.

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The Astronomy Show on Drystone Radio

 Join me, Martin Lunn MBE every Monday evening from 7.00 pm-9.00 pm on the award-winning Astronomy Show on Drystone Radio, probably the only regular astronomy show on any radio station in the country. 

I will take my weekly look at the night sky and look at all the latest news in astronomy. There will be the astronomical anniversaries this week plus the latest news from the astronomical societies in the north of England.

The Astronomy Show every Monday evening only on Drystone Radio live online at www.drystoneradio.com DAB radio in Bradford and East Lancashire, or 102 and 103.5 FM and can also be heard later on the Drystone Radio Podcast.

 

A little ramble through 19th century astronomy - Mira Ceti in 1779

Nature July 6^th 1876

Mira Ceti

Reference is often made in treatises on astronomy to the unusual degree of brilliancy attained by this variable star at the maximum of 1779.

From the observations of Bode, Herschel and Wargentin, we have the following particulars of the augmentation and diminution of brightness in that year.

Aug 22 – Invisible in an ordinary 2 feet telescope

Sept 8 – Seen with the same instrument but very faint

Sept 18 Immediately visible to the naked eye according to Herschel. Bode estimated it magnitude 4

Oct 5 and Oct 6 – Already much brighter than Menkar (alpha Ceti)

Oct 15- Oct 19 – Equal to alpha Arietis on the 15^th and still brighter on the 19^th; the light reddish

Oct 30 – According to Wargentin, it was equal to Aldebaran and of the same colour, or even of the redness of Mars which was observable the same night. In a 10 feet achromatic Mira shot out vivid red rays. Herschel considered it midway in brightness between alpha Arietis and Aldebaran.

Nov 2 – There was even an increase, in the judgement of Herschel

Nov 11 – Visible as early as Aldebaran and Mars

Nov 20 – As bright as, but not brighter than stars of the second magnitude, according to Herschel, but on the 25^th much brighter than Menkar, though less than Aldebaran according to Wargentin

Dec 4 – Only equal to alpha Arietis

Dec 7 and Dec 10 – So much diminished since November 25, that it was now hardly equal to Menkar, and its colour was now whiter.

Dec 25 – Before the Moon rose equal to gamma Ceti, or of the third magnitude

Dec 29 – Only a little brighter than the fourth magnitude; not equal to gamma or delta Ceti

Argelander gives for the date of maximum Nov 6 1779

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Cooke Telescope Tales - two telescopes for sale in Newcastle in 1945

Two Cooke telescopes were being offered for sale in Newcastle in 1945 by Hartley Hopper. One was a 4 inch and the other was a 5 inch. I don’t have any information regarding the histories of these two telescopes.

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Cooke Telescope Tales - Telescope for sale in Manchester in 1952

 In 1952 a telescope with a 5 inch lens made by Thomas Cooke & Sons was for sale. It was the property of Mr H L Dilks who I believe had been a previous president of the Manchester Astronomical Society between 1937 - 45. As is often the case I don’t know who might have owned the telescope before Mr Dilks. 

Although the lens and equatorial mount, iron pillar and clockwork drive were made by Cooke the tube and finder telescope had been made by Wary. 

In addition to the telescope a small portable wooden observatory was also offered for sale.

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A little ramble through 19thy century astronomy - few sunspots in 1876

 Nature June 22^nd 1876

According to the photographs taken daily at Montmartre by M. Janssen , no spots have now been noticed on the Sun since March 25^th. At the last meeting of the Paris Academy, M. Leverrier announced that in addition to the solar work to be carried out by M. Janssen in the new physical observatory of Paris, M. Cornu has been appointed to make corresponding searches in the National Observatory. 

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