light year
... that there is only one nonzero digit to its left (M). – Step 3: Count how many places you have to bounce the decimal point to get there (n). – Step 4: Rewrite in the M x 10n form. ...
... that there is only one nonzero digit to its left (M). – Step 3: Count how many places you have to bounce the decimal point to get there (n). – Step 4: Rewrite in the M x 10n form. ...
Can we prove God Exists? Part 1 How can modern science help us
... model. Discoveries about the origin of the Big Bang as well as the requirements for life on a planet like earth reveal more and more the hand of a Creator and make it less and less likely this could all have happened by mere chance. This chapter will investigate the possible cause of the Big Bang an ...
... model. Discoveries about the origin of the Big Bang as well as the requirements for life on a planet like earth reveal more and more the hand of a Creator and make it less and less likely this could all have happened by mere chance. This chapter will investigate the possible cause of the Big Bang an ...
the curious incident of the dog in the night-time
... Olbers was not the originator of the quandary, and in reality, it is not a paradox but rather a riddle or puzzle1 ) states that if the universe is infinite and filled uniformly with stars, then the brightness of the night sky should be equivalent to the day. As an analogy think about the old adage t ...
... Olbers was not the originator of the quandary, and in reality, it is not a paradox but rather a riddle or puzzle1 ) states that if the universe is infinite and filled uniformly with stars, then the brightness of the night sky should be equivalent to the day. As an analogy think about the old adage t ...
ASTR100 Class 01 - University of Maryland Department of
... reflected light. Planets may be rocky, icy, or gaseous in ...
... reflected light. Planets may be rocky, icy, or gaseous in ...
An analogy
... – more peculiar galaxies are observed: could be due to patchy star formation (younger age) or to interactions being more frequent (denser Universe) – resolution is poor compared to local galaxies and usually limited to a few bandpasses, and not necessarily those observed for nearby galaxies – select ...
... – more peculiar galaxies are observed: could be due to patchy star formation (younger age) or to interactions being more frequent (denser Universe) – resolution is poor compared to local galaxies and usually limited to a few bandpasses, and not necessarily those observed for nearby galaxies – select ...
z - STScI
... • When and how do the first stars and galaxies form? – HST and Keck have detected very luminous star ...
... • When and how do the first stars and galaxies form? – HST and Keck have detected very luminous star ...
Active Galactic Nuclei
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
How Close is our Nearest Neighbor
... When Shapley did his experiment, he had to measure the distances to globular clusters. To do this, he used Henrietta Leavitt’s discovery that certain variable stars obeyed a period-luminosity law so that their luminosities could be determined by measuring their periods of variation. These variable s ...
... When Shapley did his experiment, he had to measure the distances to globular clusters. To do this, he used Henrietta Leavitt’s discovery that certain variable stars obeyed a period-luminosity law so that their luminosities could be determined by measuring their periods of variation. These variable s ...
`Daniel` – The Colonization of Tiamat
... 8. What we now view as the Milky Way galaxy is just another solar system that is gravitationally bound to our own. Many “galaxies” are in the same situation; see NGC 4674 A&B, NGC 7318 A&B, all the “Antennae” and “Mice” galaxies. They are just solar systems within the gravitational limits of each ot ...
... 8. What we now view as the Milky Way galaxy is just another solar system that is gravitationally bound to our own. Many “galaxies” are in the same situation; see NGC 4674 A&B, NGC 7318 A&B, all the “Antennae” and “Mice” galaxies. They are just solar systems within the gravitational limits of each ot ...
Star formation in galaxies over the last 10 billion
... Two immediate results: I. Galaxies formed at some point in the distant past II. Galaxies evolved with time ...
... Two immediate results: I. Galaxies formed at some point in the distant past II. Galaxies evolved with time ...
stargazing - davis.k12.ut.us
... depending on the planet you wanted to visit. Rockets can travel through space at about 75,000 mph or 121,000 kph. If we wanted to visit Venus, our closest planet, we would have to travel about 14.5 days. Pluto, a dwarf planet further than our farthest planet, would take us about 5.5 years to reach. ...
... depending on the planet you wanted to visit. Rockets can travel through space at about 75,000 mph or 121,000 kph. If we wanted to visit Venus, our closest planet, we would have to travel about 14.5 days. Pluto, a dwarf planet further than our farthest planet, would take us about 5.5 years to reach. ...
Lecture 2: ppt, 5 MB
... Chandra observations of another stellar black hole, GX 339-4, indicate that it is spinning rapidly ...
... Chandra observations of another stellar black hole, GX 339-4, indicate that it is spinning rapidly ...
Volcanoes and Igneous Activity Earth - Chapter 4
... Universe was once confined to a “ball” that was • Supermassive • Dense • Hot ...
... Universe was once confined to a “ball” that was • Supermassive • Dense • Hot ...
astrocoursespring2012lec5-1-1
... At first it wasn't understood what these objects were, since their spectra were unlike those of any known stars. Its spectrum did not resemble that of any normal stars with typical stellar elements. 3C 273 was the first object to be identified as what we now know quasars to be — extremely luminous o ...
... At first it wasn't understood what these objects were, since their spectra were unlike those of any known stars. Its spectrum did not resemble that of any normal stars with typical stellar elements. 3C 273 was the first object to be identified as what we now know quasars to be — extremely luminous o ...
EarthComm_c1s3
... of galaxies in the universe. According to a popular theory, the universe itself formed somewhere between 12 and 14 billion years ago in an event called the big bang. This is known as the big bang theory. Big bang makes it sound like the universe began in an explosion. However, it did not. Scientists ...
... of galaxies in the universe. According to a popular theory, the universe itself formed somewhere between 12 and 14 billion years ago in an event called the big bang. This is known as the big bang theory. Big bang makes it sound like the universe began in an explosion. However, it did not. Scientists ...
The James Webb Space Telescope: A Vision for the Future
... These two close-up images by the Hubble Space Telescope reveal how different the star-forming nebula NGC 2174 appears in visible and near-infrared light. On the top is a visible-light view, revealing a rugged landscape, with ridges and tall pillars of gas. The near-infrared image below shows how inf ...
... These two close-up images by the Hubble Space Telescope reveal how different the star-forming nebula NGC 2174 appears in visible and near-infrared light. On the top is a visible-light view, revealing a rugged landscape, with ridges and tall pillars of gas. The near-infrared image below shows how inf ...
Life in the Universe - University of Georgia
... Angle, distance, and Powers of Ten Lecture 2 by Inseok Song ...
... Angle, distance, and Powers of Ten Lecture 2 by Inseok Song ...
SpfFin - Academic Program Pages
... We live in a "flat" universe with a decelerating rate of expansion. We live in an open universe with a constant rate of expansion given by Hubble’s law. We live in a "flat" universe with an accelerating rate of expansion. 28. The recently estimated density of radiation and matter in the universe (in ...
... We live in a "flat" universe with a decelerating rate of expansion. We live in an open universe with a constant rate of expansion given by Hubble’s law. We live in a "flat" universe with an accelerating rate of expansion. 28. The recently estimated density of radiation and matter in the universe (in ...
ASTRONOMY 113 Modern Astronomy
... How big is the Milky Way Galaxy? How big is the universe? How do our lifetimes compare to the age of the universe? It is very important to grasp the huge distances and enormous time spans that we deal with in astronomy. The way to do this is to create a SCALE MODEL. ...
... How big is the Milky Way Galaxy? How big is the universe? How do our lifetimes compare to the age of the universe? It is very important to grasp the huge distances and enormous time spans that we deal with in astronomy. The way to do this is to create a SCALE MODEL. ...
The Universe Fine-Tuned for Life
... red dwarf is transported mainly by convection. (In a heated pot, energy is transported from the bottom to the top by the convection of water.) Red dwarfs emit mainly infrared light, whose energy is too feeble to support life. In terms of their characteristics, sun-like stars fall between red dwarfs ...
... red dwarf is transported mainly by convection. (In a heated pot, energy is transported from the bottom to the top by the convection of water.) Red dwarfs emit mainly infrared light, whose energy is too feeble to support life. In terms of their characteristics, sun-like stars fall between red dwarfs ...
CMBR and BH evaporation
... Meanwhile, we cannot consider such a process without taking into account the BH’s real environment. Particularly, one has to account some counteraction to its evaporation due to cosmic microwave background radiation (CMBR) that BH absorbs. Generally, a role of a matter can be more than this one of C ...
... Meanwhile, we cannot consider such a process without taking into account the BH’s real environment. Particularly, one has to account some counteraction to its evaporation due to cosmic microwave background radiation (CMBR) that BH absorbs. Generally, a role of a matter can be more than this one of C ...
Time From the Perspective of a Particle Physicist
... Cosmology. Hubble law Universe is expanding, gives universe’s age, depends on Hubble “constant” changes with time. Closed universe has gravity slowing the expansion so it starts to contract. Open universe expands forever. Early universe was very hot and when matter was created. First electrons, pr ...
... Cosmology. Hubble law Universe is expanding, gives universe’s age, depends on Hubble “constant” changes with time. Closed universe has gravity slowing the expansion so it starts to contract. Open universe expands forever. Early universe was very hot and when matter was created. First electrons, pr ...
Galaxies
... • Star systems like our Milky Way • Contain a few thousand to tens of billions of stars. • Large variety of shapes and sizes ...
... • Star systems like our Milky Way • Contain a few thousand to tens of billions of stars. • Large variety of shapes and sizes ...
Sparta High School
... 5.1 Science Practices: All students will understand that science is both a body of knowledge and an evidence-based, model-building enterprise that continually extends, refines, and revises knowledge. The four Science Practices strands encompass the knowledge and reasoning skills that students must a ...
... 5.1 Science Practices: All students will understand that science is both a body of knowledge and an evidence-based, model-building enterprise that continually extends, refines, and revises knowledge. The four Science Practices strands encompass the knowledge and reasoning skills that students must a ...
What Is a Light
... (40,000,000,000,000) kilometers from Earth. Such a large number is difficult to understand and use in calculations. For this reason, astronomers use a different unit of measurement when they talk about distances between stars. ...
... (40,000,000,000,000) kilometers from Earth. Such a large number is difficult to understand and use in calculations. For this reason, astronomers use a different unit of measurement when they talk about distances between stars. ...
Observable universe
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects has had time to reach the Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth.The word observable used in this sense does not depend on whether modern technology actually permits detection of radiation from an object in this region (or indeed on whether there is any radiation to detect). It simply indicates that it is possible in principle for light or other signals from the object to reach an observer on Earth. In practice, we can see light only from as far back as the time of photon decoupling in the recombination epoch. That is when particles were first able to emit photons that were not quickly re-absorbed by other particles. Before then, the Universe was filled with a plasma that was opaque to photons.The surface of last scattering is the collection of points in space at the exact distance that photons from the time of photon decoupling just reach us today. These are the photons we detect today as cosmic microwave background radiation (CMBR). However, with future technology, it may be possible to observe the still older relic neutrino background, or even more distant events via gravitational waves (which also should move at the speed of light). Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since recombination—and the observable universe, which includes signals since the beginning of the cosmological expansion (the Big Bang in traditional cosmology, the end of the inflationary epoch in modern cosmology). According to calculations, the comoving distance (current proper distance) to particles from the CMBR, which represent the radius of the visible universe, is about 14.0 billion parsecs (about 45.7 billion light years), while the comoving distance to the edge of the observable universe is about 14.3 billion parsecs (about 46.6 billion light years), about 2% larger.The best estimate of the age of the universe as of 2015 is 7010137990000000000♠13.799±0.021 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.8 billion light-years distance. It is estimated that the diameter of the observable universe is about 28 gigaparsecs (91 billion light-years, 8.8×1026 metres or 5.5×1023 miles), putting the edge of the observable universe at about 46–47 billion light-years away.