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EarthSky Voices

Ghostly neutrino caught in South Pole ice ushers in a new astronomy

Last week, scientists announced the 1st known source for ghostly, high-energy neutrinos. The source is a blazar, a billion-solar-mass black hole 3.7 billion light-years away. The discovery establishes a new way to study the universe.

5 things we know – and 5 we don’t – about ‘Oumuamua

Mysterious ‘Oumuamua is the 1st confirmed interstellar object to pass through our solar system.

Pluto: Preparing for the perfect alignment

Here’s how and why astronomers plan to aim the Hubble Space Telescope and several ground-based telescopes toward Pluto around the July 12 Earth transit.

Have aliens visited Earth? Question worthy of study, says physicist

About 5 percent of all UFO sightings cannot be easily explained by weather or human technology. A physicist argues that there’s compelling evidence to justify serious scientific study and that the skeptics should step aside – for the sake of humanity.

Will we recognize life on a distant world?

“We won’t have a ‘yes’ or ‘no’ answer to finding life elsewhere. What we will have is a high level of confidence that a planet appears alive for reasons that can only be explained by the presence of life.”

Why does the ocean have waves?

Waves are created by energy passing through water. Here’s what you need to know, in 30 seconds.

Mapping the threat of small near-Earth asteroids

65 million years ago, a monster asteroid wiped out 2/3 of all life on Earth, including the dinosaurs. But an astrophysicist explains why it’s the smaller near-Earth objects (NEOs) that pose a greater imminent threat.

Will your summer will be full of mosquitoes?

Now that it’s summer in the Northern Hemisphere, our thoughts turn to … mosquitoes! Here’s some handy info from a biologist.

Will climate change make rice less nutritious?

As atmospheric carbon dioxide levels rise, rice plants – the primary food source for more than 3 billion people – produce fewer vitamins and other key nutrients. 

10 things about Martian dust storms

Mars’ massive dust storms have been challenging – and enticing – scientists for decades. From NASA, here’s the scoop on Martian dust.