There are eight planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Two of the largest moons are bigger than the smallest planet, Mercury. Here are the top 10 largest non-planets in our solar system (eight of them are moons and two of them are dwarf planets).Continue reading Top 10 Largest Non-Planets In Our Solar System
Have you ever wondered how the Sun would look from the other planets in our solar system? Here is a visual showing the apparent size of the Sun from the planets of the solar system, including Earth.Continue reading Apparent Size of the Sun from other planets
In December 2018, astronomers discovered the farthest known object in our solar system, which is about 120 times farther than Earth is from the Sun (120 Astronomical Units -AU) and named it “Farout” (far-out-there). But its record didn’t last long. Now, while searching for the hypothetical Planet X, Scott Sheppard, an astronomer at the Carnegie Institution for Science in Washington, D.C. has found what might be the most distant object ever identified in the Solar System. It orbits the Sun at a massive distance of 140 Astronomical Units (AU), and for now, the astronomers are jokingly calling the new object “FarFarOut”.Continue reading FarFarOut: the new farthest object in our solar system
This… is… amazing!
Astrophotographer Martin Junius recorded this stunning video of the total solar eclipse on March 20, 2015, during the E-Flight AB 1000. In the video, you can see the shadow of the moon moving across the clouds below. The plane was 35,000 feet (10,600 meters) above the Northern Atlantic / Norwegian Sea when the video was recorded.Continue reading Watch: The shadow of the Moon during a solar eclipse
As of 2019, only five space probes are leaving the solar system: Pioneer 10, Pioneer 11, Voyager 1, Voyager 2 and New Horizons. The Voyagers already left the solar system and entered the interstellar space (Voyager 1 on August 25, 2012, and Voyager 2 on November 5, 2018. The others also will leave the heliosphere Notes 1 and reach the interstellar space in a few years.
All of these spacecraft are launched by NASA.Continue reading Five space probes leaving the solar system (for now)
The speed of light is the Universal speed limit – nothing can travel faster than light. In the vacuum (commonly denoted c), its exact value is 299,792,458 meters per second (around 186,000 miles per second). In other words, if you could travel at the speed of light, you could go around the Earth 7.5 times in one second.Continue reading Speed of Light – See how torturously slow it is
Launched by NASA on September 5, 1977, to study the outer solar system, the Voyager 1 is the furthest human-made object from Earth. As of January 10, 2019, the space probe is more than 13,491,481,615 miles (21,712,434,988 km) away from our home planet. It is also moving away at a speed of 38,026.77 mph (61,198.15 km/h) relative to the Sun. But, thanks to NASA’s Deep Space Network (DSN) Notes 1, we can still communicate with it (also with its sister, Voyager 2). But how far can Voyager 1 go before we lose communication?
The video published by the Primal Space channel below looks at how we communicate with Voyager and when it will eventually stop receiving our signals.Continue reading Watch: How far can Voyager 1 go before we lose contact?
We only see one side of the moon, because it is tidally locked to the planet Earth (tidal locking the situation when an object’s orbital period matches its rotational period). What if the Earth was tidally locked to the Sun?Continue reading What if the Earth was tidally locked to the Sun?
A beautiful Ultima Thule image, taken by the Long Range Reconnaissance Imager (LORRI) aboard NASA’s New Horizons spacecraft in original context against a starry background (i.e., not zoomed in).Continue reading Ultima Thule image against a starry background
NASA Goddard Planetary Scientist James O’ Donoghue created a nice animation showing the sidereal days and axial tilts of the solar system planets.Continue reading The sidereal days and axial tilts of the Planets