Billions of years ago, Mars was likely a much warmer and wetter place than the cold, dry, barren world we see today. Whether there was life there or not remains an open question. But there’s a massive, growing wall of evidence showing that Mars may have had the necessary conditions for life in the past, including at least one system of river valley networks.
An ice shelf in Antarctica is about to give birth to a baby. This baby is a giant, spawned by growing cracks in the Brunt Ice Shelf. It’s not clear what this’ll mean to the scientific infrastructure in the area, and to the human presence, which were both established in the 1950s.
Japan’s Hayabusa2 mission is about to get down to business. After arriving at asteroid Ryugu at the end of June 2018, and dispatching its tiny rovers to the surface, the spacecraft is about to approach the surface of the asteroid and get some samples.
Strictly speaking, there aren’t strict boundaries between Earth and space. Our atmosphere doesn’t just end at a certain altitude; it peters out gradually. A new study from Russia’s Space Research Institute (SRI) shows that our atmosphere extends out to 630,000 km into space.
Since the end of the Apollo-era, one of the main goals of NASA, Roscosmos and other space agencies has been the development of technologies that will enable a long-term human presence in space. These technologies will also help when it comes time to mount renewed missions to the Moon, to Mars, and other locations in the Solar System. Over the past few decades, these efforts have yielded Mir and the International Space Station (ISS).
In the coming years, these efforts will also lead to the Lunar Orbital Platform-Gateway and commercial space stations – like the Bigelow B330. And if private aerospace companies like the Gateway Foundation get their way, we’ll also have a spaceport in orbit around Earth. The company recently posted a video showing exactly what this rotating wheel space station will look like, and how companies like SpaceX could help build it.
We live in a time when our spacecraft orbiting Mars at an altitude of about 300 km. can snap photos of a dust devil and transmit them back to us so we can share them on the internet. Not only that, but we have rovers wandering around on the surface taking pictures of the dust storms, too. Big deal, you say? So what, you say?
Dr. Emily Holt is an Environmental Archaeologist and Anthropologist who is currently a Visiting Assistant Professor at Miami University of Ohio. Emily’s research focuses on human-environment dynamics in the Nuragic Culture of Bronze Age Sardinia. She directs the Pran’e Siddi Landscape Project (PSLP), an archaeological survey in south-central Sardinia, which is examining the long-term changes in settlement patterns, water use, and the socio-cultural interpretation of natural resources.
Emily is also the president of the non-profit organization Public Scholar Outreach whose mission is to support, produce, promote, and disseminate high-quality public scholarship, especially public scholarship that is peer-reviewed and public scholarship with relevance to contemporary issues. PSO’s primary initiative is to establish Dirt & Words: an online, open access channel of peer-reviewed public scholarship about the human past.
Today, Emily and Fraser will be discussing how ancient cultures understood astronomy, a topic she recently discussed with Paul Sutter on his Space Radio broadcast.
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The All Stars Party, featuring Dr. Paul Sutter, Fraser Cain, Dr. Pamela Gay, John Michael Godier and Skylias, will be in Joshua Tree National Park this June – information is here at astrotours.co/allstars.
If you’d like to join Dr. Paul Sutter and Dr. Pamela Gay on their Cosmic Stories in the SouthWest Tour in August 2019, you can find the information at astrotours.co/southwest.
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A nova star is like a vampire that siphons gas from its binary partner. As it does so, the gas is compressed and heated, and eventually it explodes. The remnant gas shell from that explosion expands outward and is lit up by the stars at the center of it all. Most of these novae explode about once every 10 years.
But now astrophysicists have discovered one remnant so large that the star that created it must have been erupting yearly for millions of years.
Welcome back to Messier Monday! Today, we continue in our tribute to our dear friend, Tammy Plotner, by looking at Cetus A, the bright reflection nebula known as Messier 78!
During the 18th century, famed French astronomer Charles Messier noticed the presence of several “nebulous objects” while surveying the night sky. Originally mistaking these objects for comets, he began to catalog them so that others would not make the same mistake. Today, the resulting list (known as the Messier Catalog) includes over 100 objects and is one of the most influential catalogs of Deep Space Objects.
