Image Credit: Vito Technology

The Moon and Mars will meet in the April sky this weekend for a conjunction and an occultation. Although the latter is visible only from Southeast Asia, the conjunction of the two space objects will be observable from almost all locations. How to see the shining duo? Keep reading!

What is an occultation in astronomy?

Occultation happens when one object passes in front of another from an observer’s perspective. There are several types of occultations, including occultations by the Moon. They occur when the Moon passes in front of a star or a planet, hiding it.

While star occultations are relatively frequent, an occultation of a…


On April 12, the world celebrates the International Day of Human Space Flight. It commemorates the flight of Yuri Gagarin on the Vostok 1 spacecraft. In 2021, it will be 60 years since Gagarin’s journey into space. Today, we’ll talk about the history of this flight and remember another space-related event that also happened on April 12.

You can also watch our short documentary about Yuri Gagarin’s flight.

Preparations for the flight

After the successful launch of the first artificial satellite, Sputnik 1, in 1957, the USSR started thinking about the next milestone — putting the first human into the…


An exceptionally close asteroid approach – asteroid GW4

On the International Day of Human Space Flight, the newly discovered small asteroid 2021 GW4 will pass closer to the Earth than our geosynchronous satellites!🛰️ It will reach a minimum distance of around 20,000 km. In comparison, geosynchronous satellites are 36,000 km above the Earth’s surface.

2021 GW4 was discovered on the night of April 8–9, 2021, by Mount Lemmon Survey, and its diameter is estimated as 4–8 meters. The asteroid belongs to the Apollo group – near-Earth asteroids with Earth-crossing orbits.🌍

2021 GW4 will reach the maximum brightness on April 12, at around 12:30 GMT. It’s expected to have a visual magnitude of 13.5.✨

Observe the asteroid with the help of Star Walk 2. Open the app, tap the magnifier icon in the lower-left corner of your screen, and type “2021 GW4".


Image Credit: Vito Technology

We’ll reveal seven of the brightest stars with a visual magnitude below 0.1 and their constellations in today’s article. If you want to learn more dazzling stars, look at our new infographic.

How to measure the brightness of a star?

Astronomers measure the brightness of stars, planets, and other space objects using a magnitude scale. There are two types of magnitude — apparent and absolute. Apparent (or visual) magnitude is the brightness of an object as it appears in the night sky from the Earth. Apparent magnitude depends on an object’s intrinsic luminosity, distance, and other factors reducing its brightness. The lower its apparent magnitude, the brighter an…


Check out our new colorful infographic about the brightest stars and their constellations!💫 Here we talk about the stars’ brightness in easy words and range 15 of the most prominent stars in the sky. Enjoy✨


Check out our new colorful infographic about the brightest stars and their constellations!💫 Here we talk about the stellar brightness in easy words and range 15 of the most prominent stars in the sky. Enjoy✨


( Enjoy the brilliant astronomical trio in early April. )

About a week ago, the world enjoyed one of the closest Full Moons of the year. Traversing the constellation Capricornus in early April, the Moon will sweep by brilliant gas giants — Saturn and Jupiter. Don’t miss the opportunity to enjoy the brilliant astronomical trio gracing the predawn sky.

The trio of the Moon, Saturn, and Jupiter

On April 6, 2021, at 04:30 a.m. EDT (08:30 GMT), the conjunction of the 24-days-old Moon and Saturn will occur: our natural satellite will pass 3°57′ to the south of the ringed planet. The Moon and Saturn will shine among the stars of the constellation Capricornus at magnitudes of -11.3 and…


( Learn remarkable facts about the dazzling planet! )

Currently, astronomy enthusiasts can’t see the brilliant planet Venus in the skydome: Venus is very close to the Sun, so its glare outshines the planet. However, as early as April 2021, Venus will return to our sky. Make use of this time and discover some remarkable facts about this amazing planet, which will make your future observations more exciting!

Also, you can take our fun and educational quiz about Venus to test your knowledge about this planet.

When is Venus visible?

These days we can’t enjoy the view of the bright planet Venus as on March 26, 2021, it reached superior solar conjunction passing…


Image Credit: Vito Technology

You might hear that the first supermoon of 2021 is coming in March, but is it really so? In this article, we’ll try to figure it out. We’ll also provide you with the exact dates of the supermoons of 2021 and explain how and when to spot them. Let’s begin!

Is the March Full Moon a supermoon?

The first Full Moon after the March equinox falls on March 28 at 2:48 p.m. EDT (18:48 GMT). Can we call it a supermoon? The answer depends on what you consider a supermoon. The thing is, there is no official astronomical definition of this phenomenon. In our “Full Snow Moon…


From mid-March to early April, stargazers worldwide can take part in an exciting challenge — the Messier marathon. In today’s article, we’ll tell you what the Messier objects are and how you can join the Messier marathon.

What are the Messier objects?

In 1774, the French astronomer Charles Messier published his astronomical catalog. As Messier was famously obsessed with finding comets, he made a list of deep-sky objects that could be mistaken for comets and could hinder his observations. The list included nebulae, star clusters, and galaxies. The first version of the catalog contained only 45 objects, but later the…

Star Walk

Point your device at the sky and see what stars, constellations, and satellites you are looking at 🌌✨ https://starwalk.space

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