# This Exoplanet Is Raining, With Water!

Credit: ESA/Hubble, M. Kornmesser

Tough it is 34 parsecs (110 light-years) from Earth in the constellation Leo, raining with water could mean it potentially hots life.

# Can Aliens Be Made of Dark Matter And/or Dark Energy?

Credit: NASA/ESA

Dark matter and dark energy makes up 95% of the total mass-energy density in the universe. However, we know almost nothing about them; neither can we observe any dark matter or dark energy directly. So what if aliens are made of dark matter or dark energy? Can this be the reason we have not been able to find any aliens?

# How Long Will It Take Us?

Credit: Official SpaceX Photos / CRS-18 Mission

Can I live long enough to see humans landing or even living on Mars?

# General Relativity Problem Set 1 Special Relativity

Credit: NASA: Comet ISON Passes Through Virgo]

Problem Set 1: Special Relativity

# Laniakea - the Immeasurable Heaven

Credit: Nature Video / Laniakea: Our home supercluster

Somewhere in the universe is a small, blue planet, the third drop from a star called the Sun. Just one of billions of stars in a spiral galaxy known as the Milky Way. But where in the universe is the Milky Way?

A team of scientists gather data on more than 8,000 of the galaxies that surround us, they mapped each galaxies position and movement in space. And for the first time, they’ve shown that the Milky Way is part of a much larger system of galaxies - a super cluster that they have named Laniakea. The Milky Way is nested in the furthest reaches of this structure on the outskirts.

# And God Said ...

\begin{aligned} \frac{\partial\mathcal{D}}{\partial t} \quad & = \quad \nabla\times\mathcal{H} & \quad \text{(Loi de Faraday)} \\[5pt] \frac{\partial\mathcal{B}}{\partial t} \quad & = \quad -\nabla\times\mathcal{E} & \quad \text{(Loi d’Ampère)} \\[5pt] \nabla\cdot\mathcal{B} \quad & = \quad 0 & \quad \text{(Loi de Gauss)} \\[5pt] \nabla\cdot\mathcal{D} \quad & = \quad 0 & \quad \text{(Loi de Colomb)} \end{aligned}

# Understand and Derive Einstein Field Equations

In this post I am to follow DrPhysicsA’s excellent explanation (video provided at the end) and to provide some ideas myself.
I am also planning to re-write it afterwards - based on my own understanding.

# Quasar

Credit: ESO / An artist’s rendering of the most distant quasar

This artist’s impression shows how ULAS J1120+0641, a very distant quasar powered by a black hole with a mass two billion times that of the Sun, may have looked. This quasar is the most distant yet found and is seen as it was just 770 million years after the Big Bang. This object is by far the brightest object yet discovered in the early Universe.

# Block Hole

Credit: EHT Collaboration

First Image of a Black Hole
The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow.