Sunday, August 12, 2018
"All year long as Earth revolves around the sun, it passes through streams of cosmic debris. The resulting meteor showers — like the Perseids that are peaking on Sunday, August 12 — can light up night skies from dusk to dawn, and if you’re lucky you might be able to catch one.
If you spot a meteor shower, what you’re really seeing is the leftovers of icy comets crashing into Earth’s atmosphere. Comets are sort of like dirty snowballs: As they travel through the solar system, they leave behind a dusty trail of rocks and ice that lingers in space long after they leave. When Earth passes through these cascades of comet waste, the bits of debris — which can be as small as grains of sand — pierce the sky at such speeds that they burst, creating a celestial fireworks display.
A general rule of thumb with meteor showers: You are never watching the Earth cross into remnants from a comet’s most recent orbit. Instead, the burning bits come from the previous passes. For example, during the Perseid meteor shower you are seeing meteors ejected from when its parent comet, Comet Swift-Tuttle, visited in 1862 or earlier, not from its most recent pass in 1992.
That’s because it takes time for debris from a comet’s orbit to drift into a position where it intersects with Earth’s orbit, according to Bill Cooke, an astronomer with NASA’s Meteoroid Environment Office.
The name attached to a meteor shower is usually tied to the constellation in the sky from which they seem to originate, known as their radiant. For instance, the Orionid meteor shower can be found in the sky when stargazers have a good view of the Orion constellation."
The Perseids and More Meteor Showers That Will Light Up Night Skies in 2018 - The New York Times
Saturday, August 11, 2018
Friday, August 10, 2018
Thursday, August 09, 2018
Wednesday, August 08, 2018
I have used a Surface Pro 4 and I have an iPad 2018. I am an academic so I write a lot. I use Pages and Keynote as opposed to Office. You can open and save Office documents with the added advantage of using the Apple pencil. There are more elegant solutions for the iPad than you described. I purchased a $20.00 iPad case on Amazon which more securely secures the Pen than my iPad Pro ever did. Dongles? I never used Dongles because there is Airplay. You wireless transfer files of any time from your iPad to and from your iPhone or MacBook. Documents automatically sync through iCloud. I have had Office free for over 12 years. I only have used it on my Windows devices. I greatly prefer Pages and Keynote. I actually use a Microsoft mobile keyboard with my iPad when I need a keyboard. It supports IOS and works very well. I bought it years ago when I had one of the original Windows tablets before the first Surface Pro was released.