On March 14, NASA will join schools, students and science centers across the U.S. as they celebrate one of the most well known and beloved numbers: pi. Used throughout the STEM world – especially for space exploration! – pi is the number that results from dividing the circumference of any circle by its diameter. Pi can be and often is rounded to 3.14 (even though its decimals never end), which is why 3/14 has been designated National Pi Day.

It includes the NASA Pi Day Challenge which has four new problems in topics of exoplanets, helium rain, earthquake on Mars and asteroid ‘Oumuamua. Let’s solve them!

From the NASA website:

NASA is inviting people around the world to submit their names online to be placed on a microchip aboard NASA’s historic Parker Solar Probe mission launching in summer 2018. The mission will travel through the Sun’s atmosphere, facing brutal heat and radiation conditions — and your name will go along for the ride.

This simple proof of the Pythagorean theorem reveals how brilliant Einstein’s mind is. This is my first time reading his proof and immediately amazed.

Starting with a right triangle, draw a perpendicular line from the hypotenuse to the right angle. This divides the triangle into two smaller right triangles.

$$smaller~area + larger~area = original~area$$

Adding the two triangles equals the original triangle.

Lets say:

$$a = hypotenuse~of~smaller~triangle$$

$$b = hypotenuse~of~larger~triangle$$

$$c = hypotenuse~of~original~triangle$$

These triangles are similar in terms of the angles and their sides are in proportion to each other.

Since they’re all similar, each area occupies a fraction, f, of the area of the square of the hypotenuse.

$$smaller~area = fa^2$$ $$larger~area = fb^2$$ $$original~area = fc^2$$

Using all the relationships,

$$fa^2 + fb^2 = fc^2$$

Dividing the above equation by f,

$$a^2 + b^2 = c^2$$

And the Pythagorean theorem has been proved.

How does it work?

FreeTube uses the YouTube API to search for videos. It then uses the HookTube API to grab the raw video files and play them in a basic HTML5 video player, preventing YouTube from tracking that video. Subscriptions, history, and saved videos are stored locally on the user’s computer and is never sent out to Google or anyone else. You own your data.

The app is built using Electron as stated by the developer. I admire that he is being honest about using it.

The app is in beta and available for Linux, Mac and Windows.

Using calculus.

Another privacy and FOSS search engine to try other than searx.

Nokia said a 4G network was “highly energy efficient compared to analogue radio.” Nokia also said its Ultra Compact Network will be the lightest ever developed.

[…]

“Vodafone testing indicates that the base station should be able to broadcast 4G using the 1800 MHz frequency band and send back the first ever live HD video feed of the Moon’s surface.”

Excited to see what 5G has to offer but sticking with 4G for stability is reasonable. Lunar missions are getting active again.

Blogging is about control

Andy Baio:

Here, I control my words. Nobody can shut this site down, run annoying ads on it, or sell it to a phone company. Nobody can tell me what I can or can’t say, and I have complete control over the way it’s displayed. Nobody except me can change the URL structure, breaking 14 years of links to content on the web.

Ben Brooks:

Having my own site gives me complete control to do whatever I want, whenever I want, however I want. I don’t understand why people ever want it any other way.

These are also the reasons I created this site.

Expressing one’s thought is important. Why let anyone control on what you have to say?