Category Archives: Teaching

Mempersiapkan Penjelajahan Ke Luar Angkasa, Dari Bumi

Untuk melakukan penjelajahan di bumi, faktor-faktor seperti arah, posisi, dan cuaca merupakan faktor yang penting saat mempersiapkan perjalanan. Dengan menggunakan sistem navigasi dan peta, serta ramalan cuaca yang akurat hingga 2 derajat per harinya[1], kita dapat mempersiapkan rute perjalanan kita untuk mendatangi lokasi yang kita inginkan di permukaan bumi, dalam kondisi perjalanan yang terbaik. Di bumi saja, kita terbiasa untuk mempersiapkan perjalanan kita, untuk melakukan penjelajahan ke luar angkasa, di tata surya kita, bahkan di alam semesta, dunia yang misterius dan jauh berbeda kondisinya dengan bumi kita, tentu jauh lebih banyak data dan persiapan yang dibutuhkan.

Bukan persiapan seperti ini (

Read the rest of this entry

National/ International Astronomy Olympiad Problem Sheets

I have some of the files, but I think it’d be easier to link to their pages as well (so that if anyone asks me I can just link him/ her this). Basically, you can just go to their own respective websites, but having them in one place will help (and also, especially for my Indonesian students/ friends). I try to link to official websites if I can. If I don’t have the links but I have the files, will upload them.

A must read

A must read

(Still building sources from dusty folders)

Read the rest of this entry

Designing Mission Patches

As I was looking for outreach activity to do, I encounter designing space mission badges/ patches. Space mission badges is usually designed to be worn on an astronauts’ suit. They usually have the austronauts’ names, the space shuttle, symbol/ logo about the mission, and flags of the country/ies involved.

These are from all the Space Transportation System (STS) a. k. a.  Space Shuttle  missions

Read the rest of this entry

Neptu, Javanese’s Way of Fortune Telling


Fortune telling in the magazine, is a guilty pleasure to read for some people. Although most people don’t believe in it, it is still very interesting to read just for the fun of it. Who doesn’t feel curious about themselves, what does their own birthdate and personal characteristics tell about them. Other than the more famous western zodiac and the Chinese zodiac, Indonesian, especially the Javanese have their own zodiac, the name is neptu.

Read the rest of this entry

A Review of the Graphing Calculator by Mathlab

Nowadays, the smartphone plays such an important role in our lives because it is practical in many areas. It improves efficiency for whatever I need it for. It is with me wherever I go. Out of all the functions my phone can do, being a calculator is one of the best!

I tutor science to students privately and I also teach Olympiad preparation in my high school, both of them need a lot of calculations that require calculators. The problem is that my students I teach don’t have a calculator. Weirdly enough however, they all have phones, Android phones to be exact, ah… these kids.


The normal calculator in your phone is okay for basic calculation. For complex math and physics however, a scientific calculator is a must. From all of the calculators available in the market, I definitely recommend Graphing Calculator by Mathlab. Since its size is only 1.39 MB, it doesn’t even take a minute to download.

Read the rest of this entry