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Posts by
Eleanor Imster
1st planet orbiting a sunlike star discovered 30 years ago
On October 6, 1995, astronomers announced the discovery of the 1st known planet orbiting a distant sunlike star. This planet is known as 51 Pegasi b.
October 7, 2025
Copernicus’ revolution and Galileo’s vision, in pictures
It’s not a stretch to say these astronomers fundamentally changed the way we think about our place in the universe. We can gain insights into how this profound shift unfolded by looking at their actual notes.
February 19, 2025
1st photo of Earth from space, 78 years ago
On October 24, 1946 - 78 years ago today - a movie camera on board a V-2 rocket captured the 1st-ever photo of Earth from space.
October 24, 2024
When our sun dies, what will happen to Earth?
A study suggests our sun is about the lowest mass star that - when it dies - produces a visible, though faint, planetary nebula. What happens when our sun dies.
December 12, 2023
Comets and asteroids: What’s the difference?
Comets and asteroids both orbit our sun, but usually reside in different parts of our solar system. And except for a few, they're different materials.
January 31, 2023
Sputnik launched 65 years ago
The Soviet Union launched the Sputnik I satellite into Earth orbit on October 4, 1957. Sputnik’s unassuming beep ushered in the Space Age 65 years ago.
October 4, 2022
What causes an aurora, the northern or southern lights?
The aurora, or northern and southern lights, occur when charged particles from the sun interact with Earth's magnetic field. Read more here.
September 8, 2022
CME strikes Solar Orbiter before Venus flyby
On September 4, 2022, during a close flyby of Venus, Solar Orbiter was hit by a large CME. Fortunately, the spacecraft was unharmed.
September 5, 2022
Webb and Hubble see the universe differently
Webb and Hubble images of M74 - the Phantom Galaxy - show how the 2 telescopes "see" differently because they observe at different wavelengths.
August 30, 2022
Drought around the world, August 2022, in dramatic images
Drought is crippling many regions of the world in 2022, from the US and Europe to China and the Horn of Africa. As waters recede, artifacts are appearing.
August 26, 2022
