Christopher Palma, Pennsylvania State University As an astronomer, the question I hear the most is why isn’t Pluto a planet anymore? More than 10 years ago, astronomers famously voted to change Pluto’s classification. But the question still comes up.
Tag Archives: Mercury
10 lesser-known space facts
Did you know that the Moon and space itself have a smell? Space has a lot of surprises. Here are the 10 lesser-known space facts.
Solar System through the eyes of Hubble Space Telescope
Hubble Space Telescope was launched on April 24, 1990, and entered service on May 20, 1990. Since then, it has observed all the planets in our Solar System, apart from Earth and Mercury. Earth is far better studied by geologists on the ground and specialized probes in orbit. Hubble can’t observe Mercury as it is […]
Apparent Size of the Sun from other planets
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.
The sidereal days and axial tilts of the Planets
NASA Goddard Planetary Scientist James O’ Donoghue created a nice animation showing the sidereal days and axial tilts of the solar system planets.
Yet Another Scale Model of the Solar System (video)
Previously I posted articles titled “If The Moon Were Only 1 Pixel – A Tediously Accurate Map Of The Solar System” and “A Scale Model Of Solar System Drawn In The Desert And The Result Is Stunning”. Since the human brain cannot deal with really large numbers, these articles provide amazing ways to understand how big […]
Size comparison of the Sun and the planets
This size comparison of the Sun and the planets in our solar system is going around frequently, but it’s still amazing to see it. Created by the San Francisco-based artist Roberto Ziche, the image features the Sun in the background with the planets, Moon, and the four dwarf planets lined up in the foreground in the […]
