Since the first humans were born on Earth, we have been trying to learn about the Universe in which we inhibit. Thousands of years of observations and thinking have enabled us to develop a standard cosmological model capable of better describing the evolution of the Universe since the hot big bang. With technical progress and the development of precise measurement techniques, more results show that there is inconsistency between observation and theory, such as Hubble tension, which poses a pressing problem in modern cosmology.....

Full moons are not uncommon occurrences. Yet how much do you know about these natural phenomena? Here we will delve into the two supermoons we just bore witness to. The strawberry full moon on 14 June and buck full moon on 14 July.…

Recent discovery by astronomers reveals that in the centre of every big galaxy there exists a giant black hole which is about one million to one billion times heavier than our Sun. Stars orbit around the black hole being pulled by gravity...

If you have done star-gazing, you probably would have enjoyed and admired the majestic arrangements of stars into galaxies. Our Sun is a typical star in the Milky Way, our home galaxy, a typical galaxy in the universe. The hundreds of billions of galaxies in the observable universe group into galaxy clusters, forming even larger structures. Other than stars, what constitutes a galaxy? How did galaxies and galaxy clusters form? How did these structures emerge from the almost perfectly uniform distribution in the early universe? ..…

On 19 November 2021, a partial lunar eclipse occurred over the sky of Hong Kong in the evening. In fact, this partial lunar eclipse started at about 2pm HKT when the "Moon enters penumbra"....

In 1931, an American chemical engineer, Dr Samuel Stephens KISTLER bet his colleague, Dr Charles LEARNED, that they could replace the liquid inside a jelly with gas without shrinking it. Dubbing this concept “aerogel”, they managed to make the first aerogel with silica …

On April 10, 2019, a team of scientists made history by capturing the first ever image of a black hole. This remarkable picture occupied headlines worldwide, and rightfully so – we never thought we would ever be able to capture a black hole in an image that can be passed around the world…

The first discovery of gravitational waves was made during the first so-called observation run, extended stretches of data taking, between September 2015 and January 2016. During this first observation run, Advanced LIGO made two detections of gravitational waves, both originating in the collision of two black holes…