Scientists used earthly telescopes to track hot spots on Io over a period of years and saw that it remains the most volcanically active world in our solar system.
On October 24, 1946 – 70 years ago today – a movie camera on board a V-2 rocket captured the first-ever outer space photo of Earth.
White Sands Missile Range/Applied Physics Laboratory
The answer – fewer than are in a banana – has implications for the study of human health and raises questions about what generates complexity anyway.
Do we contain the most elaborate set of instructions? Image via theconverstation /shutterstock
Images from space show a dark spot on Mars’ surface where none was seen before, thought to be where the Schiaparelli lander crashed on Mars last Wednesday.
Fun time to see a last quarter moon: just after it rises, shortly after midnight. Then the lighted portion points downward, to the sun below your feet.
The moon was almost exactly at last quarter when Jenney Disimon in Sabah, North Borneo captured this photo on July 27, 2016 (5:30 a.m. local time, or July 26 at 21:30 UTC).
Is a hypothetical large planet – far beyond Neptune – causing a tilt in the sun? Plus, evidence for a 9th planet based on “extreme Kuiper Belt objects.”
The six most distant known objects in the solar system with orbits exclusively beyond Neptune (magenta) all mysteriously line up in a single direction. Also, when viewed in three dimensions, they tilt nearly identically away from the plane of the solar system. Batygin and Brown show that a planet with 10 times the mass of the earth in a distant eccentric orbit anti-aligned with the other six objects (orange) is required to maintain this configuration. This diagram was created using WorldWide Telescope. (Credit: R. Hurt / IPAC / Caltech)
Astronomers use astronomical units – or AU – to describe solar system distances. Definition of AU here. Also, mean distances in AU to prominent solar system objects.
This little guy looks like a big-eyed mouse, but a new genetic analysis puts tarsiers on the branch of the primate evolutionary tree that leads to great apes and humans.
The photo illustrates the small size of the tarsier compared to a child. Imag via Thinkstock
Details on the annual Orionid meteor shower. How and when to watch. In 2016, the peak mornings is October 21, but, by then, the moon will be in the way.
Joe Randall created this composite shot of the Orionid meteor shower from images taken on October 21, 2014. Thanks, Joe!