Final Exam Review
... The remnant of the protostellar disk around a newborn star out of which planets may form. The remnant of the explosion of a sun-like star at the end of its life. The remnant of the explosion of a very massive star (more than 8 solar masses) at the end of its life. The combined image of many planets ...
... The remnant of the protostellar disk around a newborn star out of which planets may form. The remnant of the explosion of a sun-like star at the end of its life. The remnant of the explosion of a very massive star (more than 8 solar masses) at the end of its life. The combined image of many planets ...
Planet formation
... body with the early Earth. This body presumably formed during the oligarchic growth phase in a Lagrange point in the same orbit as Earth. It was then perturbed from its Lagrange point and eventually collided with the Earth. This scenario suggests that large moons around terrestrial planets might not ...
... body with the early Earth. This body presumably formed during the oligarchic growth phase in a Lagrange point in the same orbit as Earth. It was then perturbed from its Lagrange point and eventually collided with the Earth. This scenario suggests that large moons around terrestrial planets might not ...
Solar.System
... • Pluto’s size was overestimated after its discovery in 1930, and nothing of similar size was discovered for several decades. • Now other large objects have been discovered in Kuiper belt, including Eris. • The International Astronomical Union (IAU) now classifies Pluto and Eris as dwarf planets. • ...
... • Pluto’s size was overestimated after its discovery in 1930, and nothing of similar size was discovered for several decades. • Now other large objects have been discovered in Kuiper belt, including Eris. • The International Astronomical Union (IAU) now classifies Pluto and Eris as dwarf planets. • ...
Terestialplanets
... of Earth’s rotation • Additionally, planets move with respect to the fixed stars, that’s why they are called planets (greek: wanderers) • Due to the planet’s movement in their orbit, and Earth’s orbital motion, this additional motion – the apparent motion of the planet as seen from Earth - looks com ...
... of Earth’s rotation • Additionally, planets move with respect to the fixed stars, that’s why they are called planets (greek: wanderers) • Due to the planet’s movement in their orbit, and Earth’s orbital motion, this additional motion – the apparent motion of the planet as seen from Earth - looks com ...
Midterm 2 - SwRI Boulder
... outer solar system like Europa, Ganymede or Callisto? Circle one and explain your answer. a. synthesis in the atmosphere b. delivery by comets and meteorites c. hydrothermal vents They do not have significant atmospheres and we do not believe that Gaymamede or Callisto have the rock/water boundary c ...
... outer solar system like Europa, Ganymede or Callisto? Circle one and explain your answer. a. synthesis in the atmosphere b. delivery by comets and meteorites c. hydrothermal vents They do not have significant atmospheres and we do not believe that Gaymamede or Callisto have the rock/water boundary c ...
Document
... ecliptic. Therefore, the Sun and Earth both lie exactly on the plane of the ecliptic, and equivalently the Sun is seen by definition to lie exactly on the ecliptic as viewed from the Earth. The other planets of the solar system lie approximately but not exactly on the ecliptic: their orbits lie on p ...
... ecliptic. Therefore, the Sun and Earth both lie exactly on the plane of the ecliptic, and equivalently the Sun is seen by definition to lie exactly on the ecliptic as viewed from the Earth. The other planets of the solar system lie approximately but not exactly on the ecliptic: their orbits lie on p ...
Can you figure out which of the stars shown here have planets
... How do astronomers find planets? Usually by indirect means – like the back-and-forth wobble that an orbiting planet causes in its star – and hardly ever by just taking a picture of the planet. Even then, the best “pictures” we have of other planets are just colored points of light. Astronomers are f ...
... How do astronomers find planets? Usually by indirect means – like the back-and-forth wobble that an orbiting planet causes in its star – and hardly ever by just taking a picture of the planet. Even then, the best “pictures” we have of other planets are just colored points of light. Astronomers are f ...
Circumstellar habitable zone
In astronomy and astrobiology, the circumstellar habitable zone (CHZ), or simply the habitable zone, is the region around a star within which planetary-mass objects with sufficient atmospheric pressure can support liquid water at their surfaces. The bounds of the CHZ are calculated using the known requirements of Earth's biosphere, its position in the Solar System and the amount of radiant energy it receives from the Sun. Due to the importance of liquid water to life as it exists on Earth, the nature of the CHZ and the objects within is believed to be instrumental in determining the scope and distribution of Earth-like extraterrestrial life and intelligence.The habitable zone is also called the Goldilocks zone, a metaphor of the children's fairy tale of Goldilocks and the Three Bears, in which a little girl chooses from sets of three items, ignoring the ones that are too extreme (large or small, hot or cold, etc.), and settling on the one in the middle, which is ""just right"".Since the concept was first presented in 1953, stars have been confirmed to possess a CHZ planet, including some systems that consist of multiple CHZ planets. Most such planets, being super-Earths or gas giants, are more massive than Earth, because such planets are easier to detect. On November 4, 2013, astronomers reported, based on Kepler data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs in the Milky Way. 11 billion of these may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists. The CHZ is also of particular interest to the emerging field of habitability of natural satellites, because planetary-mass moons in the CHZ might outnumber planets.In subsequent decades, the CHZ concept began to be challenged as a primary criterion for life. Since the discovery of evidence for extraterrestrial liquid water, substantial quantities of it are now believed to occur outside the circumstellar habitable zone. Sustained by other energy sources, such as tidal heating or radioactive decay or pressurized by other non-atmospheric means, the basic conditions for water-dependent life may be found even in interstellar space, on rogue planets, or their moons. In addition, other circumstellar zones, where non-water solvents favorable to hypothetical life based on alternative biochemistries could exist in liquid form at the surface, have been proposed.