Is there life beyond Earth? Join NASA's director of planetary science James Green for a survey of the places in our solar system that are most likely to harbor alien life.
● Solving Earth's Problems: Terraforming is often seen as a potential solution to the growing environmental and resource challenges facing humanity on Earth. The sources suggest that by developing the technology to manipulate planetary environments, we may gain insights and tools that could be applie...
“Basically, Jupiter’s interior resembles that of Saturn, with a Neptune or Uranus at the center,” he said. Neptune and Uranus have been called “ice giants” because they also appear to have a rocky core surrounded by icy hydrogen and helium, but without the gas envelope of Jupiter and...
The three moons are believed to have big oceans of liquid water (液态水) under their icy shells (壳). According to ESA, the water on those moons could be as much as six times the amount in Earth’s oceans. The mission “will change our understanding of the solar system”, wrote Scien...
“One of the most significant discoveries in planetary science and astrophysics over the past decade has been the realization that icy moons hold the largest reservoir of liquid water in our solar system,” Baptiste Journaux, research professor of Earth and Space Science at the Uni...
Methanogenic bacteria were some of Earth’s first life, and they produce methane as a byproduct in hypoxic (low oxygen) conditions. In the process, they generate free energy needed for life. Scientists have wondered if methanogens could live on Saturn’s moon Titan. Could it be surviving in...
Council, said, "It's very exciting that we can now gather so much information about distant moons as well as distant planets. If some of these gas giants found outside our Solar System have moons, like Jupiter and Saturn, there's a real possibility that some of them could be Earth-...
The scientists made these conclusions by revisiting the findings from the Voyager 2 flybys of Uranus in the 1980s and from observations made here on Earth. The study’s authors then were able to build computer models with additional information from NASA’s Galileo, Cassini, Dawn and New Hori...
The super-Earth would change the shape of this Earth’s orbit, making it far less habitable than it is today, if not ending life entirely. If Kane made the planet’s mass smaller and put it directly in between Mars and Jupiter, he saw it was possible for the planet to remain stable ...
Carbon delivered to the Earth by interplanetary dnst particles may have been an important source of pre-biotic organic matter (Anders, 1989). Interplanetar... GJ Flynn - Springer Netherlands 被引量: 253发表: 1996年 Determining asteroid masses from perturbations on Mars The orbit of Mars is per...