Free (Older) Astronomy Books

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I’ve been doing a bit of an office clear-out and would like to get rid of some of the extra astronomy texts that are taking up shelf space. Some of these books are a few years old, some are relatively new, but all go over the basics of astronomy and often cosmology.

So if you’re interested in learning more about the night sky, our solar system, or other galaxies and beyond, come to the UPEI campus and pick up a book. I’ve piled them up in a stack outside my office, Duffy Science Centre room 415, so you can come by at any time whenever the building is unlocked (i.e. weekdays from very early to very late, sometimes on weekends).

UPDATE: June 15 Viewing Cancelled

UPDATED: The forecast for the evening of Sunday, June 15 is no better than it was for Saturday evening, so the rescheduled viewing will also have to be cancelled. Hopefully conditions will be better next month in July so our viewing can go ahead then!

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This viewing is scheduled at a later hour and with a shorter duration because, of course, the sun is setting later and later as we approach the summer solstice so we are having fewer hours of darkness suitable for astronomical viewings.

Everyone is welcome to attend public viewings.  To do so, meet in Memorial Hall in room 417 and you will be guided up to the observatory when it is available.  It is necessary to climb the stairs one floor up to the observatory, however the elevator can be taken up to the 4th floor before doing so.

Public viewings are co-hosted by the UPEI Physics Department and the Charlottetown Centre of the Royal Astronomical Society of Canada (RASC).

Found an old telescope! (UPEI’s first telescope?)

What happens when the laboratory technicians are assessing the equipment in the physics storeroom and notice a long wooden box on the top shelf? 003

They open up the box and find a telescope.

002It may seem strange to not know that we had this telescope, but a combination of changing astronomy instructors with a departmental move (that causes equipment to end up in new unknown locations) can result in an item getting forgotten.

This telescope is a 6-inch Newtonian reflector. I’m not sure how old it is – it sort of has a ’70s look to me. Perhaps this was the first telescope that UPEI Physics had in the 1970s, when observations took place on the roof of the Duffy building. It does have homemade replacement dust covers, which would fit with the story of how the original dust covers blew off the roof during a windy observation session.

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The telescope was made by Anchor Optical Co. which now seems to exist as Anchor Optics (a division of Edmund Optics) that makes specialized lenses for research and educational applications.

 

Given the telescope’s size, it should be great for field work. We have material to build a solar filter, so this will probably also become our solar telescope.

 

 

When will the sky be clear?

The weather in PEI can change quickly and frequently involves clouds, all of which can make it tricky to see the stars. A quick look at our list of past Public Viewings shows that we end up cancelling about half of the time because of uncooperative weather.

Forecasts offered by weather services can be pretty brief so it can be difficult to figure out at what time on what night the sky may be clear enough for some astronomy.

Fortunately, there is an astronomer’s forecast provided free by Clear Dark Sky. This forecast interprets local Environment Canada data through an astronomy perspective. The forecast for Charlottetown is shown below.

There is detailed information on the forecast website about how to interpret all the information provided in the above forecast, but lets just go over the basics.

The day of the week and time of day (to be read vertically in a 24-hour format) are provided above all the coloured squares. A thick red line separates one day from another.CDStime

The “Cloud Cover” line is the most important for naked-eye sky viewing. You won’t be able to see the sky if there’s clouds in the way! A white square for a particular hour indicates cloud cover whereas a dark blue square indicates no clouds. Colours in-between represent partial cloud cover.CDScloudcover

The “Darkness” line tells you when it will be dark enough for viewing (with no accounting for local light pollution). Darkest sky will be represented by black squares. On moonlit nights, you will see light blue to deep blue squares, depending on the fullness of the Moon.CDSdarkness

So now, at a glance, you can tell what’s the best time of night to head out to do some star or planet gazing.