hypothesis articles
Which Martian landform feature suggests sustained precipitation or runoff over geological timescales?
What characteristic of the water environment is strongly indicated by the presence of Martian clays (phyllosilicates)?
What evidence points toward later Martian epochs when surface water was likely highly saline?
Where is a significant fraction of Mars's original water supply currently confirmed to exist?
What defines the modern, transient liquid water features known as Recurring Slope Lineae (RSLs)?
How does the scale and nature of Martian outflow channels compare to major terrestrial flood features?
What critical geological event is implied to have led to the surface pressure dropping below the triple point of water on Mars?
Where are the Martian valley networks, indicative of slow carving, frequently located?
What contrast in water chemistry is implied when comparing early clay deposits versus widespread later sulfate deposits?
What does the sheer volume of ancient water required to carve large features suggest about the early Martian climate?
What is the leading explanation for the birth of our solar system?
Who formally developed the concept of a rotating, collapsing nebula in their 1755 publication?
What significant physical issue caused the earlier Laplacian model to encounter difficulties?
What is the modern iteration of the Nebular Hypothesis called?
What is the name of the flat, spinning structure that forms around the central protosun?
What materials condensed into solid grains in the hot inner regions closest to the nascent Sun?
What astronomical feature separates the inner rocky worlds from the outer icy worlds by defining where volatiles freeze?
Which stage of accretion involves larger bodies growing disproportionately fast by gravitationally sweeping up smaller neighbors?
What process is believed to have sculpted the final count of terrestrial planets through violent orbital interactions?
What is one leading physical mechanism proposed by the SNDM to explain the transfer of angular momentum outward from the young Sun?
What possibly triggered the gravitational collapse of the solar nebula cloud?
What structural consequence arises from rapid rotation during cloud contraction?
Which materials condensed near the hot proto-Sun to form terrestrial planets?
What condition allows volatile compounds like water to freeze beyond the frost line?
What concept explains the unified direction of the Sun's rotation and planetary orbits?
Why did encounter theories fail to explain planet formation from ejected solar material?
How is angular momentum transferred outward in modern Nebular Theory refinements?
What mechanism within the gas-and-dust disk tends to circularize planetary orbits?
What structures observed around young stars confirm the nebular disk formation environment?