‘Rachaidh mé féin anseo isteach, ‘arsa an Duinníneach nuair
a shroicheadar an eaglais. ‘Ba mhaith liom cúpla focal a bheith
agam le Tom Merrigan.’
Tharla cruinniú coiste de chuid bhuanchoiste an aonaigh
saothair ar siúl ar ardán an halla nuair a bhuail an Duinníneach
isteach agus bhí an tAthair Merrigan ag déanamh eadrána idir
seastán na gcístí agus lucht roth an áidh. Chuir sé na mná uaisle
ar fad in aithne don Duinníneach, a gheall go dtiocfadh sé chun
aonaigh agus go gceannódh sé stocaí bána cniotáilte uathu dá
mbeidís ar fáil. D’éalaigh siad on gcruinniú ansin agus shiúil
siad thart ar an halla, idir na stainníní, agus iad ag caint.
‘I’ll go in here myself,’ said Dineen when they reached the church.
‘I would like to have a few words with Tom Merrigan.’
A meeting of the standing committee of the job fair was taking place on the hall stage
when Dineen came in and Father Merrigan was mediating between the cake stand and
the wheel of fortune. He introduced all the ladies to Dineen, who promised to come to the
fair and buy white knitted socks from them if available. They then escaped from the meeting and walked around the hall, between the booths, talking.
platform, stage, stand
Separation of combatants; intervention in dispute; mediation, conciliation
f gs eadrána
m gs áidh
Content, charge; fill, capacity; cargo, load;
Class, category, of) people
As I wrote previously , Mia (my wife) and I spent last weekend at Capricon, a Chicagoland science fiction convention. We went to most of the Capricons in the ’80’s and ’90’s, but in our first years in Minnesota the pressures of parenthood prevented us from going. Those have eased somewhat and we have been to most of the Capricons (and Windycons) since 2009. While most Capricons have been in the Chicago suburbs, this year the convention was downtown, at the Sheraton Grand Hotel.
Black holes are not totally black! They will evaporate by Hawking radiation. This is required by Thermodynamics and Quantum Mechanics. All properties of a Schwarzschild Black are determined by its mass, so if you know the mass the lifetime and other properties follow automatcally. Or you can start with the lifetime and determine the initial mass. Or the Schwarzschild radius, or the temperature, or the entropy, etc. For black holes comparable in mass to “normal” astronomical units this lifetime is much longer than the current age of the universe. Viktor Toth’s Hawking radiation calculator is a convenient tool for such calculations. Here are some results:
Professional astrophotography used to be done on emulsion-coasted glass places. That was how astromical discoveries were made for nearly a
More than an estimated 2.4 million glass plates are out there in collections in North America alone. These were taken starting in
the 1890s right up until the 1970s, when CCD (Charged Couple Device) detectors started to come online for astronomy. Of these, only an
estimated 400,000 plates have been digitized to research quality
The team in this article has found a much cheaper way to proceed with this process, using
Supernovae are cosmic events of gigantic power. Their explosions can shine as bright as a galaxy, a pinprick of extraordinarily bright light in the night sky. What is less well-understood, however, is which stars reach the point of explosion and how they evolve to their deaths. Interestingly, their explosions provide astronomers with key tools to uncover fundamental aspects of our Universe. While we know that the Universe is expanding at an accelerated rate due to dark energy, the rate of the expansion of the Universe is not well-constrained. Supernovae provide us with independent ways to measure this expansion and work to resolve one of the most pivotal questions in astronomy: How fast is the Universe really expanding?
Inventing the Flat Earth: Columbus and Modern Historians, by Jeffrey Burton Russell, is the book for the day. Columbus did not show the world that the Earth was round. No educated European in 1492 believed that the Earth was flat. They all knew it was round. As all math geeks know, Eratosthenes of Cyrene had made a good calculation of the circumference of the Earth about 200 BCE.
Catholic church authorities did not say that the plan of Columbus to reach the orient by sailing westward was impossible because the Earth was flat. Their scholastic theology was based on the philosophy of Aristotle, who understood perfectly well that the Earth was round.
There are passages in the Bible that suggest a flat Earth, but almost all theologians of ancient and medieval times knew the evidence for a round Earth was overwhelming, and understood the Bible was not to be taken literally in this and similar cases.
The objection to the plans of Columbus was that, thanks to Eratosthenes, people had a good idea of the distance from the west coast of Europe to the east coast of China, and could easily calculate that no ship of the day could possibly carry enough supplies for the voyage.
Columbus, acting like a 21st century Republican, rejected the best science of the day and chose a smaller alternative value for the circumference that suited his purposes. He was just lucky that the Americas happened to be there. As a result their inhabitants were then horribly unlucky.
The story about Columbus and the flat Earth is a 19th century invention, not history.
This has happened before in astronomy. After both Neptune and Pluto were discovered, astronomers looked at old records and found that their
predecessors had seen both bodies, but had not realized they were significant. In the case of Neptune one of those predecessors was
Yesterday I got an email from Cosmoquest about a science
press conference (“presser”) where a new discovery would be announced. With all the new distance-based
communication technology anybody could watch, rather than just those in a select room, however large. The
event was put on by the Royal Astronomical Society today. I watched it on the
Cosmoquest Twitch TV channel. I had never heard of Twitch TV before.
An international team of astronomers, led by Professor
Jane Greaves of Cardiff University,
today announced the discovery of a rare molecule – phosphine – in the clouds of Venus. On Earth, this gas is
only made industrially, or by microbes that thrive in oxygen-free environments.
The discovery was made by spectroscopy using two different radio telescopes. The significance of this is that the production of phospine
by purely chemical processes is very unlikely in the atmosphere of Venus. The team looked at every possible chemical reaction they
could think up, and failed to find any that could come close to producing the observed amount of phospine.