Astronomers

Harvard astronomers theorize that a meteor that struck Earth's atmosphere in 2014 could have been from another solar system, judging by what scientists know about 'Oumuamua, an interstellar object that zipped through our solar system in 2017. (An artist's depiction of 'Oumuamua is seen here.)

An Interstellar Meteor May Have Collided With Earth in 2014

Researchers have identified an object that, they theorize, was traveling too fast to have originated within our solar system

2007 OR10 is the largest object in our solar system with out a name.

The Largest Unnamed Object in the Solar System Needs a Title—and You Can Help

2007 OR10 needs a snazzier moniker; the public can now choose between ‘Gonggong,’ ‘Holle’ and ‘Vili’

Exoplanet Core Orbiting a Dying Star May Help Astronomers Understand What Lies in Store for Our Solar System

It's likely the planetesimal orbiting a white dwarf 410 light years away was the core of a minor planet caught in its immense gravity

The most recent vortex on the left and the first one discovered in 1989 by Voyager 2.

There's a Dark and Stormy Vortex Brewing on Neptune

It is the sixth massive dark and stormy vortex found on the planet since 1989 and the only one astronomers have watched develop

The positions of the globular clusters used to estimate the mass of the Milky Way.

How Much Does the Milky Way Weigh?

Measurements from the Gaia satellite and Hubble Space Telescope show our galaxy tips the scales at about 1.5 trillion solar masses

That's so metal.

Planetary Smash-Up May Have Produced This Distant Iron Exoplanet

Computer simulations suggest Kepler 107c could have been formed when two rocky planets collided, stripping it down to its metal core

We Finally Know How Long a Day on Saturn Is

By studying oscillations in the planet's iconic rings, researchers have determined it takes Saturn 10 hours, 33 minutes and 38 seconds to rotate once

Scientists Predict Sun Will One Day Turn Into Giant Crystal Ball

New observations of white dwarfs confirm theory that the star remnants transition into solid structures as they cool

Planet Hunter TESS Is Already Spotting Hundreds of Crazy New Worlds

The first data from the space telescope's mission tallies more than 200 potential planets, including some just 50 light-years away

Ring in the New Year With Dazzling Total Lunar Eclipse of a Supermoon

The celestial show will be visible on the East Coast around 12:12 a.m. on January 21, 2019

A map of the moon with labeled features, from Selenographia by Johannes Hevelius.

The 17th-Century Astronomer Who Made the First Atlas of the Moon

Johannes Hevelius drew some of the first maps of the moon, praised for their detail, from his homemade rooftop observatory in the Kingdom of Poland

An artist's conception of the view from Farout.

Meet Farout, the Solar System's Most Distant Minor Planet

Observations suggest the object is 300 miles in diameter, pinkish-red and 3.5 times as far away from the sun as Pluto

Extragalactic Background Light

This Is How Much Starlight the Universe Has Produced

4,000,000,000,000,000,000,000,000,000,000,000,000,000,000, 000,000,000,000,000,000,000,000,000,000,000,000,000,000 photons over 13.7 billion years

The Golden Record features images of life on Earth, nature sounds, greetings recorded in 55 different languages

New Catalogue Describes Everything We’ve Sent Into Space

Entries include Doritos’ advertisement, Klingon Opera invitation, Beatles song

Water found deep within the planet's interior contains different ratio of heavy hydrogen isotopes and normal hydrogen, pointing toward separate point of origin

Where Did Earth’s Water Originate? Solar Nebula, Study Suggests

Researchers say the hydrogen contained in these clouds of gas and dust contributed to formation of one out of every 100 water molecules found on Earth

The Milky Way

The Milky Way Ate One of Its Neighbors 10 Billion Years Ago

Star data shows we gobbled up a galaxy called Gaia-Enceladus about 1/4 the size of the Milky Way, leaving behind telltale signs of the merger

Kepler Space Telescope, Revealer of New Worlds, Officially Shuts Down After Historic Mission

Launched in 2009, Kepler discovered thousands of new exoplanets before finally running out of fuel earlier this month

Well then what would we call a cow that jumps over a moonmoon?

If a Moon Has a Moon, Is Its Moon Called a Moonmoon?

A new study suggests it's possible some moons could have moons and the internet wants to give them a name—but scientists have yet to actually find one

Saturn's Rings Rain Organic Compounds Into Its Atmosphere

The Cassini probe's final flybys show that 22,000 pounds of material per second drops from the rings into the planet's ionosphere

Astronomers Find What May Be First Exomoon—And It's an Absolute Unit

Astronomers suspect that there's Neptune-sized celestial body trailing an exoplanet about 8,000 light years

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