The Search for Another Earth The Search for Another Earth
... zone of Sun-like stars. The bigger challenge is to find planets in the habitable zone of their stars where liquid water and possibly life might exist. To date, Kepler has confirmed 297 planet candidates in the habitable zone. It appears that some of these planets have water present. ...
... zone of Sun-like stars. The bigger challenge is to find planets in the habitable zone of their stars where liquid water and possibly life might exist. To date, Kepler has confirmed 297 planet candidates in the habitable zone. It appears that some of these planets have water present. ...
astronomy - Jiri Brezina Teaching
... PHYSICS (Greek: physis = nature), NCE: branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th century, and is still known by this name at a few universities. Physics is in some senses the oldest and ...
... PHYSICS (Greek: physis = nature), NCE: branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th century, and is still known by this name at a few universities. Physics is in some senses the oldest and ...
The woman who dissected the Sun
... Cannon's sequence was actually a temperature sequence, with O the hottest and S the coolest. It was temperature not composition that was responsible for the most of the differences between stars. Just because a star's spectrum showed no light from, for instance, neutral iron, did not mean it had no ...
... Cannon's sequence was actually a temperature sequence, with O the hottest and S the coolest. It was temperature not composition that was responsible for the most of the differences between stars. Just because a star's spectrum showed no light from, for instance, neutral iron, did not mean it had no ...
Grzegorz F
... phenomena: eclipses, appearances of large sunspots and solar flair fields, or passing of the inner planets (Venus and Mercury) between the Sun and Earth. In the morning of June 6, 2012 we will be able to observe the passage of Venus against the solar disk. Transits of Venus are quite rare (we will h ...
... phenomena: eclipses, appearances of large sunspots and solar flair fields, or passing of the inner planets (Venus and Mercury) between the Sun and Earth. In the morning of June 6, 2012 we will be able to observe the passage of Venus against the solar disk. Transits of Venus are quite rare (we will h ...
Lesson 1 - Structure of the Universe - Hitchcock
... What makes up the universe? • Earth is a special place because it has just the right combination of conditions to support life. • The presence of air and water supports the growth and development of plants and animals. • The atmosphere contains an ozone layer that absorbs harmful solar radiation and ...
... What makes up the universe? • Earth is a special place because it has just the right combination of conditions to support life. • The presence of air and water supports the growth and development of plants and animals. • The atmosphere contains an ozone layer that absorbs harmful solar radiation and ...
Lecture 10a Neutron Star and Black Holes (Test 2 overview)
... • Black holes can keep accumulating mass…including “colliding” Black holes. Very massive (million times mass Sun) at center of many galaxies ...
... • Black holes can keep accumulating mass…including “colliding” Black holes. Very massive (million times mass Sun) at center of many galaxies ...
Asteroids in retrograde resonance with Jupiter
... Jewitt (2005) based on the physical study of 20 such objects. However, with the exception of 1999 LE31 (Jewitt 2005) and 2005 VD (Pinilla-Alonso et al. 2013), the physical properties of our asteroid sample have not been studied so far. A possible lack of ultrared matter, rich organic material that c ...
... Jewitt (2005) based on the physical study of 20 such objects. However, with the exception of 1999 LE31 (Jewitt 2005) and 2005 VD (Pinilla-Alonso et al. 2013), the physical properties of our asteroid sample have not been studied so far. A possible lack of ultrared matter, rich organic material that c ...
Ocean-like water in the Jupiter
... For decades, the source of Earth’s volatiles, especially water with a deuterium-to-hydrogen ratio (D/H) of (1.558 6 0.001) 3 1024, has been a subject of debate. The similarity of Earth’s bulk composition to that of meteorites known as enstatite chondrites1 suggests a dry proto-Earth2 with subsequent ...
... For decades, the source of Earth’s volatiles, especially water with a deuterium-to-hydrogen ratio (D/H) of (1.558 6 0.001) 3 1024, has been a subject of debate. The similarity of Earth’s bulk composition to that of meteorites known as enstatite chondrites1 suggests a dry proto-Earth2 with subsequent ...
Publication - Centre for Star and Planet Formation
... respectively. The binary star consists of a Sun-like star and a companion roughly one-third its size, orbiting each other every 7.45 days. With an orbital period of 49.5 days, 18 transits of the inner planet have been observed, allowing a detailed characterization of its orbit and those of the stars ...
... respectively. The binary star consists of a Sun-like star and a companion roughly one-third its size, orbiting each other every 7.45 days. With an orbital period of 49.5 days, 18 transits of the inner planet have been observed, allowing a detailed characterization of its orbit and those of the stars ...
Sponge: What two factors cause the seasons on Earth?
... During a lunar eclipse the moon is a reddish color because some sunlight is bent by the Earth’s atmosphere and reaches the Moon. This light is reddish for the same reason that the sunset is red and orange. ...
... During a lunar eclipse the moon is a reddish color because some sunlight is bent by the Earth’s atmosphere and reaches the Moon. This light is reddish for the same reason that the sunset is red and orange. ...
kepler`s laws and newton`s discovery of universal
... paper, and drive a thumbtack through each point. Tie the ends of a length of thread to the tacks, loop the thread around the tip of a pencil, and stretch the thread taut (see Figure B8.1a). Now move the pencil in a full circuit around the two tacks, keeping the thread tight and the pencil tip in con ...
... paper, and drive a thumbtack through each point. Tie the ends of a length of thread to the tacks, loop the thread around the tip of a pencil, and stretch the thread taut (see Figure B8.1a). Now move the pencil in a full circuit around the two tacks, keeping the thread tight and the pencil tip in con ...
Gravitational redshifts
... Apparent radial velocity during transit (Rossiter-McLaughlin effect). Wavelengths (here Gaussian fits to synthetic line profiles) are shorter than laboratory values due to convective blueshift. Curves before and after mid-transit (µ = 0.21, 0.59, 0.87) are not exact mirror images due to intrinsic st ...
... Apparent radial velocity during transit (Rossiter-McLaughlin effect). Wavelengths (here Gaussian fits to synthetic line profiles) are shorter than laboratory values due to convective blueshift. Curves before and after mid-transit (µ = 0.21, 0.59, 0.87) are not exact mirror images due to intrinsic st ...
lecture_1_mbu - X-ray and Observational Astronomy Group
... Solar gravity is insufficient to retain high temperature coronal gas Gas is a plasma (ionized but electrically neutral on a large scale) Material from outer corona blows off into space , usually along open field-lines (e.g. coronal holes), but also following solar flares. Mass loss ~10-13 Msun/yr Wi ...
... Solar gravity is insufficient to retain high temperature coronal gas Gas is a plasma (ionized but electrically neutral on a large scale) Material from outer corona blows off into space , usually along open field-lines (e.g. coronal holes), but also following solar flares. Mass loss ~10-13 Msun/yr Wi ...
28_starships
... smaller than Earth's Moon — too small to account for the perturbations, in any case. In June 1978, James W. Christy noticed that in one image, Pluto's point of light seemed to have a bump on it. He went back and looked at other photographs and Pluto seemed to have a bump in many of those images, too ...
... smaller than Earth's Moon — too small to account for the perturbations, in any case. In June 1978, James W. Christy noticed that in one image, Pluto's point of light seemed to have a bump on it. He went back and looked at other photographs and Pluto seemed to have a bump in many of those images, too ...
Chapter 5 Gravitational fields - crypt
... Comparing this equation with the equation for a straight line through the origin, we can see that the gradient is equal to GM. [1] b ...
... Comparing this equation with the equation for a straight line through the origin, we can see that the gradient is equal to GM. [1] b ...
Lecture 1 - X-ray and Observational Astronomy Group
... Solar gravity is insufficient to retain high temperature coronal gas Gas is a plasma (ionized but electrically neutral on a large scale) Material from outer corona blows off into space , usually along open field-lines (e.g. coronal holes), but also following solar flares. Mass loss ~10-13 Msun/yr Wi ...
... Solar gravity is insufficient to retain high temperature coronal gas Gas is a plasma (ionized but electrically neutral on a large scale) Material from outer corona blows off into space , usually along open field-lines (e.g. coronal holes), but also following solar flares. Mass loss ~10-13 Msun/yr Wi ...
Lecture 1a: Class overview and Early Observations 8/27
... the fixed stars, with a period of roughly 26,000 years. This gyroscopic motion is due to the tidal forces exerted by the Sun and the Moon on the solid Earth, which has the shape of an oblate spheroid rather than a sphere. The Sun and Moon ...
... the fixed stars, with a period of roughly 26,000 years. This gyroscopic motion is due to the tidal forces exerted by the Sun and the Moon on the solid Earth, which has the shape of an oblate spheroid rather than a sphere. The Sun and Moon ...
AST1100 Lecture Notes
... 4. Assume that the Sun consists entirely of protons with a mass of 1.67 × 10−27 kg. Use the solar mass of 2 × 1030 kg, the solar radius of 700 000 km and the surface temperature of the Sun T = 5780K to obtain the density ρ0 and thereby the core temperature TC . (By doing this calculation properly ta ...
... 4. Assume that the Sun consists entirely of protons with a mass of 1.67 × 10−27 kg. Use the solar mass of 2 × 1030 kg, the solar radius of 700 000 km and the surface temperature of the Sun T = 5780K to obtain the density ρ0 and thereby the core temperature TC . (By doing this calculation properly ta ...
Grade 5 Unit 6
... What It Looks Like in the Classroom In this unit of study, students explore the effects of gravity and determine the effect that relative distance has on the apparent brightness of stars. They also collect and analyze data in order to describe patterns of daily changes in length and direction of sha ...
... What It Looks Like in the Classroom In this unit of study, students explore the effects of gravity and determine the effect that relative distance has on the apparent brightness of stars. They also collect and analyze data in order to describe patterns of daily changes in length and direction of sha ...
Powerpoint
... The Hertzsprung–Russell Diagram An H–R diagram of the 100 brightest stars looks quite different. These stars are all more luminous than the Sun. Two new categories appear here – the red giants and the blue giants. Clearly, the brightest stars in the sky appear bright because of their enormous lumin ...
... The Hertzsprung–Russell Diagram An H–R diagram of the 100 brightest stars looks quite different. These stars are all more luminous than the Sun. Two new categories appear here – the red giants and the blue giants. Clearly, the brightest stars in the sky appear bright because of their enormous lumin ...
Objectives for Units 1-3
... limb darkening suggest the surface of the moon is rough on both a large and small scale. 4. Explain how it was possible to predict the Moon has no atmosphere. a. Using the kinetic theory of gases, it was shown that gas molecules in the high daytime temperatures on the Moon travel faster than the Moo ...
... limb darkening suggest the surface of the moon is rough on both a large and small scale. 4. Explain how it was possible to predict the Moon has no atmosphere. a. Using the kinetic theory of gases, it was shown that gas molecules in the high daytime temperatures on the Moon travel faster than the Moo ...
Stars: from Adolescence to Old Age
... – pressure due to fusion in core • hydrogen in the core eventually converted to helium nuclear reactions stop! • gravity takes over and the core shrinks • outside layers also collapse • layers closer to the center collapse faster than those near the surface. • As the layers collapses, the gas comp ...
... – pressure due to fusion in core • hydrogen in the core eventually converted to helium nuclear reactions stop! • gravity takes over and the core shrinks • outside layers also collapse • layers closer to the center collapse faster than those near the surface. • As the layers collapses, the gas comp ...
The Black Drop effect - ROSS
... seems to remain attached to the rim of the solar disc for a couple of seconds, becoming deformed and assuming a black drop shape. This phenomenon is repeated right before the last internal contact. This effect is known as the “Black-Drop” effect and it prevents the accurate measurements of the time ...
... seems to remain attached to the rim of the solar disc for a couple of seconds, becoming deformed and assuming a black drop shape. This phenomenon is repeated right before the last internal contact. This effect is known as the “Black-Drop” effect and it prevents the accurate measurements of the time ...
PH607 – Galaxies 2
... monitored. However, in spite of all efforts, no unambiguous NIR counterpart of SgrA* could be detected up to 2003. On the 9th of May, during routine observations of the GC star cluster at 1.7 microns with NAOS/CONICA at the VLT, we witnessed a powerful flare at the location of the black hole. Within ...
... monitored. However, in spite of all efforts, no unambiguous NIR counterpart of SgrA* could be detected up to 2003. On the 9th of May, during routine observations of the GC star cluster at 1.7 microns with NAOS/CONICA at the VLT, we witnessed a powerful flare at the location of the black hole. Within ...
Formation and evolution of the Solar System
The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.