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[l] at 2/14/20 5:00am
The Moon’s absence from the evening sky affords viewers an excellent opportunity to see the elusive zodiacal light, while Luna’s presence before dawn results in a series of spectacular planetary conjunctions.
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[l] at 2/13/20 5:00am
Data from the tiny world known as Arrokoth reveal brand new insights into how the planets came together.
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[l] at 2/13/20 5:00am
After spending nearly a full year in space, scientists will use Koch’s mission to study how microgravity affects women.
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[l] at 2/12/20 5:00am
Astronomers estimate that there are billions of worlds beyond our solar system.
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[l] at 2/12/20 5:00am
SpaceX and other companies are rushing to put thousands of small, inexpensive satellites in orbit, but pressure to keep costs low and a lack of regulation leave those satellites vulnerable to hackers.
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[l] at 2/10/20 5:00am
The joint mission from the ESA and NASA will allow humans to get a closer look at the star at the center of our solar system.
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[l] at 2/7/20 5:00am
Mercury puts on its best evening show of 2020 this week, though every bright planet appears at some point during the night.
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[l] at 2/6/20 5:00am
A massive galaxy in the early universe had already finished making stars by about 1.8 billion years after the Big Bang, challenging astronomers' current models.
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[l] at 2/6/20 5:00am
What will happen to the solar system when the Sun dies? It might be the end of planet Earth, but life could still find a way.
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[l] at 2/5/20 5:00am
ALMA captured the aftermath of a scrap between two stars.
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[l] at 2/5/20 5:00am
The Rosetta mission found a regular pattern of varying red and blue hues on the comet as it passes near to and then away from the sun.
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[l] at 2/4/20 5:00am
Giant impacts could explain the many differences between the ice giants of our solar system, computer simulations show.
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[l] at 2/4/20 5:00am
An intriguing thought experiment explores the awesome power of our star.
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[l] at 2/3/20 5:00am
A new generation of ground-based telescopes and proposed space missions could soon reveal their secrets.
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[l] at 1/31/20 5:00am
While Mercury and Venus dominate the early evening sky, Mars and Jupiter rule before dawn.
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[l] at 1/31/20 5:00am
The data could help scientists understand why the sun's corona is so much hotter than its surface.
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[l] at 1/31/20 5:00am
The new Daniel K. Inouye Solar Telescope will let us study the Sun in unprecedented detail.
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[l] at 1/30/20 5:00am
The effect, called frame-dragging, lends insight into the system’s history.
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[l] at 1/30/20 5:00am
Infrared light can pierce through obscuring dust and reveal features of stars and planets otherwise undetectable.
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[l] at 1/29/20 5:00am

The dayside of this scorching world is so hot that it splits hydrogen molecules in twain. But don’t worry, they can recombine after migrating to the planet’s cooler nightside.

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[l] at 1/29/20 5:00am
Though the Hubble Space Telescope was named after Edwin Hubble, we might not have any space telescopes (including Hubble) without the renowned astrophysicist Lyman Strong Spitzer.
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[l] at 1/29/20 5:00am
If they do collide, they will smash into one another at more than 30,000 miles per hour, leading to a cloud of debris circling the Earth.
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[l] at 1/29/20 5:00am
A temporary malfunction aboard the interstellar spacecraft triggered an automatic fail-safe to conserve power.
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[l] at 1/28/20 5:00am
As its mission comes to an end, here's a look back on some of the greatest discoveries Spitzer made while exploring our dusty universe. 
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[l] at 1/28/20 5:00am
Infrared observing won’t go down with this flagship, but it will change.
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[l] at 1/28/20 5:00am
Spitzer has far outlived expectations, continuing to reveal the wonders of the universe even as its instruments began shutting down.
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[l] at 1/27/20 5:00am
Spitzer will be powered down this week. But what happens to the orbiting telescope now?
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[l] at 1/24/20 5:00am
Brilliant Venus passes closer to distant Neptune than it has in 36 years, highlighting a week that features several outstanding celestial sights.
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[l] at 1/24/20 5:00am

Some scientists have been poking at the foundations of dark energy, but many say the concept remains on solid, if mysterious, ground.

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[l] at 1/23/20 5:00am
The superluminous supernova SN 2006gy may have been the result of a small, dense white dwarf spiraling into the core of its giant stellar companion.
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[l] at 1/23/20 5:00am

The iconic space telescope is getting ready for its last few days of exploring the universe. 

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[l] at 1/22/20 5:00am
Micrometeorites billions of years old provide a unique glimpse at our planet's atmospheric past.
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[l] at 1/22/20 5:00am
Staggeringly huge, surprisingly small, and blisteringly fast — stars come in many sizes and flavors. Here are some of the strangest.
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[l] at 1/22/20 5:00am

Sharpen your observing skills on the Moon's craters, lava flows, and an elusive letter X.

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[l] at 1/21/20 5:00am
An astrophysicist explains why planets only come in two main flavors.
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[l] at 1/21/20 5:00am
Scientists have created a prototype "lunar oxygen plant" by testing a method for extracting oxygen from imitation Moon rocks that could be invaluable for lunar settlements.
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[l] at 1/21/20 5:00am
The Australian crater Yarrabubba is the oldest known on Earth, according to new measurements, and it might be linked to the end of a “Snowball Earth” ice age.
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[l] at 1/21/20 5:00am
Voting is now open on nine entries submitted by school-age children across the U.S.
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[l] at 1/20/20 5:00am
The finding may help physicists better understand where cosmic rays — energetic particles that permeate the universe — come from.
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[l] at 1/20/20 5:00am
A successful test of the abort system means the spaceflight company is on the verge of sending humans into space.
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[l] at 1/17/20 5:00am
While a crescent Moon passes near three planets this week, Venus has a rare close meeting with Neptune.
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[l] at 1/17/20 5:00am
The dust-shrouded objects may be binary stars merging as they orbit the supermassive black hole in our galaxy's core.
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[l] at 1/15/20 5:00am
Located just 4.2 light-years away, the star Proxima Centauri now has both an Earth-like world in its habitable zone and a more distant super-Earth.
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[l] at 1/14/20 5:00am
The next three spacewalks will complete fixes to the space station’s solar panels and Alpha Magnetic Spectrometer particle detector.
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[l] at 1/14/20 5:00am
A new study shows that being in a binary star system can keep a massive star spinning fast enough to produce such powerful explosions.
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[l] at 1/13/20 5:00am
The Babylonians' calendar was passed down from civilization to civilization.
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[l] at 1/13/20 5:00am
Some of the ancient grains may have been created by a boom in stars forming in the Milky Way about seven billion years ago.
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[l] at 1/10/20 5:00am
The Full Moon dominates the night sky early this week, but as it moves out of the way, stargazers can view Orion with an uncharacteristically faint Betelgeuse.
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[l] at 1/10/20 5:00am
The pair of stars known as V Sagittae is on a spiraling collision course whose explosive end we'll see by the end of the century, astronomers think.
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[l] at 1/9/20 5:00am
Scientists gain a new glimpse into a billions-of-years-old event in the universe that allowed light to shine freely.
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[l] at 1/9/20 5:00am
Einstein's equations have held up remarkably well for over a century. But they leave tantalizing gaps in our knowledge.
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[l] at 1/9/20 5:00am
The third and most recent launch includes one experimentally darkened satellite. Astronomers have yet to see whether it's an effective solution.
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[l] at 1/3/20 5:00am
Although the prolific Quadrantid meteor shower peaks under a Moon-free sky the morning of January 4, the Full Moon dominates the night sky by week’s end.

As of 2/28/20 3:50pm. Last new 2/13/20 3:44pm.

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