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This is a response to two classmates. I have to classmate picked out below. When you reply to a post of a classmate, make some comparisons between the planet s/he just posted about and the planet you are researching. How much larger/smaller of an orbit does your planet have? What does this tell you about how the periods of the two planets will differ, according to Kepler’s third law? How much larger/smaller is the period of your planet really, according to the exoplanet database? Which planet travels in a more circular orbit, as determined by its eccentricity (Links to an external site.)Links to an external site.?



The exoplanet I will be discussing is Kepler-186f. This exoplanet was identified in the Kepler-186 system and it lies roughly 151 parsecs or 492 light years away from earth (Planet Kepler-186f, 2014). NASA’s Kepler mission discovered the exoplanet in 2014 but didn’t confirm its existence until the team could present solid evidence of their findings in 2015. The team would only have to wait roughly 130 days to see the light of Kepler-186 dim again ultimately validating the team’s findings of an exoplanet. Although the planet has been confirmed, its mass, and density are yet to be discovered. The planet orbits an M dwarf (red dwarf) star and is half the size and mass of our sun which would explain the orbit of Kepler-186f taking much less time than earth’s orbit (Culler, 2014).

The most interesting piece of information about Kepler-186f is that scientists believe this planet to be the first confirmed earth-sized planet in another system to be in the habitable zone. The habitable zone is the general area a certain distance from a systems star that would allow a planet to contain liquid water. Don’t be fooled by the term habitable. Just because the exoplanet lies within the habitable zone doesn’t necessarily mean the atmosphere is consistent with earths. Currently we don’t possess the technology to get a clear picture of the exoplanets surface but given its distance from the sun all theories up to this date would indicate that the planet likely has a rocky surface. When asked about the discovery UC Berkley astronomer Geoff Marcy claimed “This is the best case for a habitable planet yet found. The results are absolutely rock solid. The planet itself may not be [rocky], but I’d bet my house on it. In any case, it’s a gem” (Kramer, 2014).


The exoplanet I’ve selected for research is MASCARA-1b. MASCARA-1b was discovered on July 17th, 2017 with the Multi-site All-Sky CAmeRA (MASCARA) on Northern Station- Roque De Los Muchachos Observatory in the Canary Islands, and Southern Station- La Silla Observatory in Chile. MASCARA-1b is a gas giant exoplanet that orbits the A-type Star, (MASCARA-1-HD20158). A-type stars are among the more common naked eye stars and are typically bluish-white. MASCARA-1b’s mass is approximately 3.7 Jupiter’s, and its radius, approximately 1.5 Jupiter’s. MASCARA-1b’s orbital radius is 0.04AU from it’s Star (MASCARA-1) and its orbital period is 2.1 days. MASCARA-1b has a very high equilibrium temperature, making it one of the hottest gas giants to date! Temperatures are estimated to be 2550 K, with a hydrogen/helium-based atmosphere.

Some more fun facts:

Assuming you were driven to MASCARA-1b in a car at 60 miles per hour, it would take approximately 7 billion years to get there. At light speed (670 million miles per hour) it would take 615 years, which astonishingly, is still not even in your great-great-great-great grandchildren’s lifetime!

Furthermore, the discovery of MASCARA-1b is the very FIRST exoplanet discovered with the Multi-site All-Sky CAmeRA (MASCARA). Each MASCARA station has 5 high-powered cameras that cover the entire local sky.

MASCARA-1 lies in a part of host star parameter space that has been largely unexplored to date, as it is a bright early-type star.

My Post

Name of exoplanet: TrES-5
How it was discovered: It is believed a group of people examining Jupiter discovered this exoplanet. They discovered TrES-5 which is described as a Jupiter that orbits on a star GSC 03949-00967 and takes 1.48 days to complete one revolution (Mandushev et al., 2011).
Its distance from Earth: When looking up the distance from this exoplanet to the earth I read it is 360 (+- 11) pc. I am not exactly sure how far that is regarding normal metric units (Mandushev et al., 2011).
The spectral type, mass, and age of the star it orbits: When looking at the fact sheet provided I did not see anything annotated for the spectral type. The mass of the exoplanet is 0.893 (+- 0.024) MSun. The age of TrES-5 is 7.38 (+-1.87) Gyr.
When it was discovered: TrES-5 was found in 2011.
Who discovered it: There is a list of people mentioned for the discovery of this exoplanet. Those names are as follows; Edward Dunham, David Latham Markus Rabus, Lars A. Buchhave, Juan A. Belmonte, Samuel Quinn, David Charbonneau, Markus Rabus, Timothy M. Brown, Brian Oetiker, and, Francis T O’Donovan.
Any known information about the planet, such as its mass, size of its orbit, orbital period, etc.: Some other facts, the radius is 1.209 (-0.021 +0.021) RJ. The effective temperature is 5171 (+- 36). It is found in one of the dimmest stars in the solar system. The planet transit to date. Its discovery shows that spectroscopy and photometry are possible from the ground even if the faints stars study is quite challenging.


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