Tag: light years

Sky Guide

Sky Guide

Sky Guide. It’s not free, but the small fee is worth it if you like celestial things. IMG_4035

Just a quick entry today about an app that I bet most of you have never heard of. Of course, there are plenty of sports apps and things I don’t know about. But this is cool for everyone who has ever looked up at the stars at night and wondered what the heck they were looking at.

This is a screen print from my phone of the app. I took it this morning, as you can see, the sun is in the east, and the sky is dark so you can see the stars. You can’t tell from the screen print, but it shows the constellations, planets, stars in real time. You can also set the time and date for almost any day in the past or future and see what the sky looked like at that moment.

If you tap on an object, such as a white dot, the name of the item will appear and you can tap again for a detailed description, including the type of star, its distance in light years, and its location in degrees and minutes.

If you want to search for something specific, just tap the menu icon and you are given choices of stars, satellites, planets, and more to search for! Tap the Satellites, and select the ISS. You’ll get a quick location and its path in the sky.

It has some ethereal music to go with it, and if you are sky watching, simply hold your device with the camera pointing in the sky. It will automatically orient itself and tell you exactly what you’re looking at. Point it toward a dot in the sky, you’ll discover you’re looking at Jupiter or Venus, or Regulus or Betelgeuse.

But don’t take my word for it. Go to the app store and check it out for yourself. Nothing is quite as fun as hearing a push notification that the ISS is going to be flying overhead in 5 minutes! What are you waiting for, go have some fun!

Moon Day

Moon Day

Artist's impression of the trio of super-Earths discovered by an European team using the HARPS spectrograph on ESO's 3.6-m telescope at La Silla, Chile, after 5 years of monitoring. The three planets, having 4.2, 6.7, and 9.4 times the mass of the Earth, orbit the star HD 40307 with periods of 4.3, 9.6, and 20.4 days, respectively.
Artist’s impression of the trio of super-Earths discovered by an European team using the HARPS spectrograph on ESO’s 3.6-m telescope at La Silla, Chile, after 5 years of monitoring. The three planets, having 4.2, 6.7, and 9.4 times the mass of the Earth, orbit the star HD 40307 with periods of 4.3, 9.6, and 20.4 days, respectively.

I like to challenge the brain on a regular basis. Now I’m going to challenge your brain.  Don’t look up the answer on the internet right away, this is a private process for your brain only.

True or False:  The nearest earth type planet discovered by humans is only 4 light years away.

Think about that for a minute. Four light years, if we could travel the speed of light, would take, well, four years to reach (at a speed of 186,000 miles per second, or seven times around the diameter of the earth).  If we could go ten times the speed of light, it would still take more almost five months (speed of 1,860,000 miles per second). It takes eight minutes for the light of our sun to reach the earth. Four light years is pretty far away. At 17,000 mph, the current average space shuttle speed, it would take 165,000 years to reach a planet 4 light years from here.

And the truth is the closest earth-like planet discovered is 11.9 light yeas away around the sun-like star Tau Ceti. Now triple all the figures above. Half a million years to get there with today’s technology? That’s the disappointing fact. Even a generational ship is a pretty far stretch of the imagination. And yet we still dream of discovering life on other planets, shaking hands with extra terrestrials, or at least finding an amoebae we can bring home in a Petri dish.   So what do we do?

We keep hunting nearby, we keep studying whatever we can, and we don’t stop reaching for the stars.

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